King 6 (Nyílthalmaz)
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Rektaszcenzió: 3h 28m
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Deklináció: 56° 27'
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Csillagkép: Camelopardalis
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Dátum/idő: 2008.03.15 19:00 UT
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Műszer: 300/1500 Newton
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Látómező: 27'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 5/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Még a legfényesebb tagja is csak 10 magnitúdós ennek az 5-7'-es halmaznak, a többség (nagyjából féltucat csillag) közelebb áll a 12 magnitúdóhoz. A háttérben méghalványabb csillagok rejtőznek (nagyjából 30-35 db), melyek főképp elfordított látással látszódnak, 14 magnitúdós fényesség körül. Háttere grízes, ami sejtetni engedi, hogy a háttérben rengeteg, méghalványabb csillagocska rejtőzködhet.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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King 6 (Open cluster)
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Right ascension: 3h 28m
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Declination: 56° 27'
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Constellation: Camelopardalis
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Date/time: 2008.03.15 19:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 27'
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Magnification and filter(s): 71x
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Even the brightest star of this 6-7' cluster is only 10m, and all the rest of its brighter stars (about half a dozen) are also near 12m. Hidden in the background are even fainter members (about 30-35), which can be seen by averted vision to the 14th magnitude or so. It has a fuzzy background, suggesting plenty of even fainter stars.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M34 (Nyílthalmaz)
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Egyéb elnevezés: NGC 1039
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Rektaszcenzió: 2h 42m
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Deklináció: 42° 47'
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Csillagkép: Perseus
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Dátum/idő: 2008.01.25 18:00 UT
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Műszer: 300/1500 Newton
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Látómező: 47'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 5/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Fényes, nagy méretű nyílthalmaz, közepén négy kifejezetten fényes csillaggal. Nem túl sűrű, így a keresőben nem könnyű észrevenni halvány foltocskaként. Számomra az igazi érdekessége a nagyszámú kettőscsillag halmaztag - bár ezeknek nem mindegyike fizikai kettős.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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M34 (Open cluster)
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Also known as: NGC 1039
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Right ascension: 2h 42m
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Declination: 42° 47'
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Constellation: Perseus
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Date/time: 2008.01.25 18:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 47'
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Magnification and filter(s): 71x
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Shiny, large size open cluster with four brighter stars in the middle of it. It's not too dense, therefore it may not be easily detectable in the finderscope. For me the real essence of it are the high number of double stars, however not all of these are real binaries in real.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M44 (Nyílthalmaz)
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Egyéb elnevezés: NGC 2632, Jászol halmaz
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Rektaszcenzió: 8h 41m
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Deklináció: 19° 48'
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Csillagkép: Cancer
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Dátum/idő: 2010.02.16 01:00 UT
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Műszer: 300/1500 Newton
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Látómező: 1°
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Nagyítás és szűrő(k): 45x
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Nyugodtság: 7/10
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Átlátszóság: 2/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Hatalmas, fényes nyílthalmaz, a Rák csillagkép közepén. Annyira fényes, hogy még szabadszemmel is könnyen felfedezhető 4-4.5 határmagnitúdójúnál jobb égen. Átmérője a telihold kétszerese, ezért legjobban nagy látómezejű távcsövekben (rövid refraktorok, binokulárok, keresőtávcsövek) mutat. Ez a halmaz számomra kiváltképp különleges, mivel ez volt az első mélyég-objektum amit távcsővel megpillantottam (2001-ben egy 114/900-as tükrössel). Tucatnyi viszonylag fényes fehér és kékes tónusú csillag emelkedik ki a rengeteg halványabb tag közül, némelyek érdekes háromszögeket alkotnak. Az időjárás nem volt túl kedvező a rajzoláshoz, -11°C-ot mértem az észlelés végeztével.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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M44 (Open cluster)
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Also known as: NGC 2632
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Right ascension: 8h 41m
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Declination: 19° 48'
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Constellation: Cancer
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Date/time: 2010.02.16 01:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 1°
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Magnification and filter(s): 45x
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Seeing: 7/10
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Transparency: 2/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Huge, bright open cluster in the middle of the Cancer constellation. It's so bright that it can be easily noticed with the naked eye on a sky that has a NELM of at least 4-4.5 magnitudes, as a faint fuzzy spot. It's actual diametre when viewed in a telescope is twice as large as that of the full Moon, therefore it's best viewed in a wide field telescope like a short rafractor, finderscope or binoculars. I've some sentimental feelings about this object, because it was the first deep space object I've ever observed with my own telescope (a 114/900 newt back in 2001). It has some dozens of relatively bright stars with white or a bit bluish colours, some of them forming spectacular triangles. The weather conditions were not favorable for sketching, I measured -11°C when I finished this session.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M45 + Hold okkultációja (Nyílthalmaz)
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Egyéb elnevezés: Fiastyúk, NGC 1432, NGC 1435
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Rektaszcenzió: 3h 48m
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Deklináció: 24° 12'
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Csillagkép: Taurus
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Dátum/idő: 2010.02.21 19:00 UT
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Műszer: 300/1500 Newton
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Látómező: 1° 1'
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Nagyítás és szűrő(k): 45x
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Nyugodtság: 5/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Legnagyobb szerencsémre tiszta egem volt, mikor ez a ritka esemény bekövetkezett - nem sok ilyen esténk volt még ezen a télen. Az 50%-os fázisú Hold a Fiastyúk halmaz déli részén volt látható. A rajzon a Hold mellett szereplő csillag nagyjából 5-10 percig látszott mielőtt égi kísérőnk eltakarta volna.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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M45 + Moon occultation (Open cluster)
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Also known as: Pleiades, NGC 1432, NGC 1435
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Right ascension: 3h 48m
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Declination: 24° 12'
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Constellation: Taurus
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Date/time: 2010.02.21 19:00 UT
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Equipment: 12" f/5 Newtonian Scope
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FoV: 1° 1'
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Magnification and filter(s): 45x
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
I was very fortunate that we had a clear night when this rare event occured, we had only a couple of such evenings this winter sofar. The 50% Moon was on the Southern side of the Pleiades. The star you may notice near the Moon was visible only for about 5-10 minutes, before it was covered by our little brother.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M48 (Nyílthalmaz)
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Egyéb elnevezés: NGC 2548
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Rektaszcenzió: 8h 14m
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Deklináció: -5° 47'
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Csillagkép: Hydra
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Dátum/idő: 2010.02.21 20:30 UT
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Műszer: 300/1500 Newton
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Látómező: 47'
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Nagyítás és szűrő(k): 45x
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Nyugodtság: 7/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Ez a nagy, közepesen fényes halmaz könnyedén észrevehető már az 50mm-es keresőtávcsőben vagy binokulárban is. Távcsövön keresztül megszámlálhatatlan csillagot látni, melyek fényessége és szine közel azonos. Némi ködös hátteret is észlelek, amely további rengeteg halványabb tagról árulkodik. A körülmények nem voltak ideálisak az objektum észleléséhez, mivel a közeli félhold jelentősen lecsökkentette az ég határmagnitúdóját (az SQM 17.33-at mutatott a Hold felé, 19.46-ot a Holddal átellenes irányban, -3°C és alacsony páratartalom mellett).
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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M48 (Open cluster)
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Also known as: NGC 2548
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Right ascension: 8h 14m
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Declination: -5° 47'
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Constellation: Hydra
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Date/time: 2010.02.21 20:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 47'
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Magnification and filter(s): 45x
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Seeing: 7/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This large, moderately bright open cluster can be detected easily in a 50mm finderscope or binocular. When looking through the telescope I see countless number of stars that are very similar both in colour and luminosity. I can also detect some foggy background which may be miriads of unresolved stars. The conditions were not perfect to sketch this cluster because the 50% Moon caused a low NELM (SQM reading was 17.33 towards the Moon and 19.46 opposite the Moon, -3°C, low humidity).
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Hi-resolution image: [ reversed sketch | original sketch ]
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M50 (Nyílthalmaz)
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Egyéb elnevezés: NGC 2323
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Rektaszcenzió: 7h 3m
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Deklináció: -8° 20'
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Csillagkép: Monoceros
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Dátum/idő: 2008.02.12 20:15 UT
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Műszer: 300/1500 Newton
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Látómező: 22'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 7/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Ez az aránylag ritkán említett Messier-objektum már a keresőtávcsőben is nagy, diffúz foltként látszik. Alacsony/közepes nagyítással egy sűrű, tömör nyílthalmaz tárul szemünk elé. A halmaz egy különösen szép tagja a középponttól körülbelül 9'-re északra látható vörös óriás 1.7-es szín indexszel, HD 52938 névvel katalogizálva. 7.82 magnitúdós fényességével ez egyben a halmaz legfényesebb tagja. Fényes vörös színe miatt érdekes módon nem gondolnám, hogy 2 magnitúdóval fényesebb a többi csillagnál a halmaz központjában, inkább utóbbiak látszódnak fényesebbnek.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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This sketch was featured on Astronomy Sketch of the Day on Jan 14, 2009.
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M50 (Open cluster)
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Also known as: NGC 2323
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Right ascension: 7h 3m
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Declination: -8° 20'
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Constellation: Monoceros
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Date/time: 2008.02.12 20:15 UT
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Equipment: 12" f/5 Newtonian
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FoV: 22'
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Magnification and filter(s): 71x
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Seeing: 7/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This rarely mentioned Messier object looks like a diffuse, large spot even through the finderscope. On a low/moderate magnification a view of solid, dense open cluster appears in front of our eyes. A very nice member of the cluster can be found around 9' north from the middle of the cluster: a red giant of a color-index of 1.7, catalogued as HD 52938. With its 7.82 magnitude luminosity its also the brightest star of the cluster. Interestingly, because of its shiny red colour, I wouldn't think that this star is nearly 2 magnitudes brighter than the other stars in the centre of the cluster, which look like they're the brightest by far.
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Hi-resolution image: [ reversed sketch | original sketch ]
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This sketch was featured on Astronomy Sketch of the Day on Jan 14, 2009.
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M52 + OCL261 (Nyílthalmaz)
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Egyéb elnevezés: NGC 7654 + Czernik 43 (Cz 43)
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Rektaszcenzió: 23h 24m
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Deklináció: 61° 35'
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Csillagkép: Cassiopeia
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Dátum/idő: 2008.01.24 18:00 UT
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Műszer: 300/1500 Newton
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Látómező: 40'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 5/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Könnyű megtalálni ezt a két csillaghalmazt a Kassziopeia csillagkép közelében. A Messier 52 nagyon nagy nyílthalmaz, határai jól definiáltak, átmérője legalább 20'. Egy nagyon fényes csillag meghatározó eleme a halmaznak, egyébként csillagokban gazdag objektum, de ezek jelentősen halványabbak fényes társuknál. Az M52-től keletre látható az OCL261 nyílthalmaz (más néven Czernik 43), tucatnyi halvány csillag alkotja.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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M52 + OCL261 (Open cluster)
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Also known as: NGC 7654 + Czernik 43 (Cz 43)
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Right ascension: 23h 24m
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Declination: 61° 35'
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Constellation: Cassiopeia
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Date/time: 2008.01.24 18:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 40'
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Magnification and filter(s): 71x
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
These two star clusters can be found easily nearby the constellation Cassiopeia. The Messier object M52 is a quite large open cluster with clearly identifiable boundaries and has a diameter of at least 20'. Its image is determined by a very bright star, however the cluster itself looks quite rich, even though the brightness of other stars is not even close to their brightest companion. To the east from M52, behind a wall of shiny stars lies the open cluster OCL261 (also known as Czernik 43), populated with a dozen dim stars.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M67 (Nyílthalmaz)
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Egyéb elnevezés: NGC 2862
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Rektaszcenzió: 8h 50m
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Deklináció: 11° 49'
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Csillagkép: Cancer
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Dátum/idő: 2008.03.30 21:30 UT
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Műszer: 300/1500 Newton
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Látómező: 24'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 7/10
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Átlátszóság: 4/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
A Rák csillagkép második legnagyobb halmaza az M44 (Jászol halmaz) után. Híresebb társához hasonlóan ez is észlelhető szabadszemmel átlagnál kicsit jobb égen. 71x nagyítás mellett a látómező felét kitölti. Megtalálása könnyű, már a 8x50-es keresőtávcső is fényes elmosódott foltként mutatja. Az M67 egy szép, sűrű nyílthalmaz, tagjainak fényessége nagyon változatos: nagyjából tucatnyi 12 magnitúdó körüli csillag dominálja, de a háttérben sok 13-14 magnitúdós csillag könnyen észrevehető. A teljes általam látható csillagpopuláció legalább száz tagból állt, de az objektum háttere erősen diffúz, így feltételezésem szerint még nagy számú halványabb csillagnak kell a háttérben rejtőznie.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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M67 (Open cluster)
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Also known as: NGC 2862
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Right ascension: 8h 50m
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Declination: 11° 49'
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Constellation: Cancer
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Date/time: 2008.03.30 21:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 24'
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Magnification and filter(s): 71x
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Seeing: 7/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
The second largest open cluster of the constellation Cancer, right after the M44, which can also be seen with naked-eyes even under suburban skies. On a power of 71x, it fills the neary half degree field of vision. It was easily found: even the 8x50 finderscope displays it as a shiny little blur. The M67 is a nice, dense open cluster, with a members of high variety of brightness: there are about a dozen dominant stars of the 12th magnitude, but in the backround you can easily detect stars of 13-14m. The entire population visible to me were at least 100 stars, however the background looks really diffuse, so I assume there must be plenty of even dimmer stars in this cluster.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M103 (Nyílthalmaz)
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Egyéb elnevezés: NGC 581
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Rektaszcenzió: 1h 33m
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Deklináció: 60° 42'
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Csillagkép: Cassiopeia
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Dátum/idő: 2008.02.19 20:00 UT
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Műszer: 300/1500 Newton
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Látómező: 27'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 6/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Közel teliholdas éjjelen, mikor a planetáris ködök és galaxisok észlelése lehetetlenné válik, a fényesebb nyílthalmazok - mint amilyen az M103 is - még mindig fényesen sziporkáznak az okulárban. A halmaz 6' átmérőjű, a Delta Cas közelében található, és különösen alacson nagyítás mellett látványos. Környezetében további érdekes halmazokat találni, mint például Trumpler 1, NGC 663 vagy az NGC 659. Ezek mindegyikét érdemes felkeresni akár gyenge égboltú észlelőhelyről is.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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M103 (Open cluster)
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Also known as: NGC 581
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Right ascension: 1h 33m
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Declination: 60° 42'
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Constellation: Cassiopeia
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Date/time: 2008.02.19 20:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 27'
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Magnification and filter(s): 71x
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Seeing: 6/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
On a night with a near fullmoon, when planetary nebulaes and galaxies are an impossible mission, brighter open clusters such as the M103 are still sparkling vividly in the eyepiece. The OC that's 6' in diameter can be located near the Delta Cas, especially spectacular on low magnification. In its neighborhood one may find such other interesting clusters like the Trumpler 1, the NGC 663 or the NGC 659, all of which worth a look even from light-polluted places.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 457 (Open cluster)
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Also known as: Owl cluster
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Right ascension: 1h 19m
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Declination: 58° 17'
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Constellation: Cassiopeia
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Date/time: 2008.01.31 19:45 UT
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Equipment: 12" f/5 Newtonian
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FoV: 31'
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Magnification and filter(s): 71x
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Seeing: 7/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
A sparsely populated open cluster that is limited by Phi Cas from the east. Prevailed by nearly a dozen stars of mag 10-11 with nearly identical colour and luminosity. In the background of these are fainter, nearly 13 mag stars of at least double the amount, which clearly form a cluster with their brighter companions despite the big difference in brightness.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 457 (Open cluster)
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Also known as: Owl cluster
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Right ascension: 1h 19m
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Declination: 58° 17'
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Constellation: Cassiopeia
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Date/time: 2008.01.31 19:45 UT
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Equipment: 12" f/5 Newtonian
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FoV: 31'
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Magnification and filter(s): 71x
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Seeing: 7/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
A sparsely populated open cluster that is limited by Phi Cas from the east. Prevailed by nearly a dozen stars of mag 10-11 with nearly identical colour and luminosity. In the background of these are fainter, nearly 13 mag stars of at least double the amount, which clearly form a cluster with their brighter companions despite the big difference in brightness.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 869 + NGC 884 (Open cluster)
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Also known as: Double Cluster
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Right ascension: 2h 21m
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Declination: 57° 12'
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Constellation: Perseus
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Date/time: 2009.07.26 1:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 1°
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Magnification and filter(s): 45x
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Seeing: 7/10
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Transparency: 3/5
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Location: Jászszentlászló, Hungary
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Observer: Ferenc Lovró
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Description:
This observation and sketch was made on an early dawn hour in the Kiskun Astro Camp near the village of Jászszentlászló, Hungary. As the Sun was already approaching the southern horizon, the NELM was getting worse at a high rate. Therefore I've decided to sketch something easy that's made of many bright stars. Out of a sudden I've picked the famous Double Cluster, which turned out to be a paint to sketch with their plenty of bright stars. So, I was racing with the Sun, as the Venus was already high above the horizon. Under country skies, this pair of open clusters can be seen to the naked eye as a small fuzzy spot near the easily recognizable W-shape of the constellation Cassiopeia. It's one of the most remarkable objects of the Northern Hemisphere, so I can't really imagine why it was not included in the famous catalogue of Messier. From my home country it is a circumpolar object, so it can be seen through the entire year. It's so easy, that it cen be resolved with the smallest telescopes or binoculars, therefore an great catch for everyone. SQM reading: 20.91 m/arcsec^2, 9°C.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1342 (Nyílthalmaz)
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Rektaszcenzió: 3h 32m
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Deklináció: 37° 26'
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Csillagkép: Perseus
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Dátum/idő: 2009.01.24 18:00 UT
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Műszer: 300/1500 Newton
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Látómező: 30'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 6/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Érdekes, nagy kiterjedésű nyílthalmaz, halvány, de láthatóan változatos fényességű tagokkal: nagyjából 10 fényesebb és 20, ezeknél jóval halványabb csillagot számlálok. Hátteréből szépen kiemelkedik. Már a kereső (8x50) is apró, halvány foltként mutatja. Leginkább egy csikóhalra emlékeztet a formája.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1342 (Open cluster)
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Right ascension: 3h 32m
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Declination: 37° 26'
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Constellation: Perseus
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Date/time: 2009.01.24 18:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 30'
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Magnification and filter(s): 71x
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Seeing: 6/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Interesting, large size open cluster with faint stars of variable magnitude: contains about 10 brighter and 20 much fainter stars. Nicely extrudes from its backround. Its cumulate size and brightness can be easily described if I say that even the finderscope shows this object as a small faint spot. The picture drawn by its stars reminds me of a horsefish.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1502 (Nyílthalmaz)
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Rektaszcenzió: 4h 8m
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Deklináció: 62° 20'
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Csillagkép: Camelopardalis
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Dátum/idő: 2008.01.26 19:30 UT
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Műszer: 300/1500 Newton
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Látómező: 7.5'
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Nagyítás és szűrő(k): 167x
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Nyugodtság: 5/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Kis mérete ellenére, könnyen megtalálható ez a nyílthalmaz. A keresőtávcsőben egy fényes csillagok alkotta csillagösvény végén csücsül. Mindössze néhány csillag alkotja, ám ezek többsége nagyon fényes, 7-11 magnitúdó közötti. A 10 legfényesebb tagon túl még nagyjából ugyanennyi csillagot számolok a 11-13 magnitúdó közötti tartományban.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1502 (Open cluster)
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Right ascension: 4h 8m
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Declination: 62° 20'
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Constellation: Camelopardalis
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Date/time: 2008.01.26 19:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 7.5'
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Magnification and filter(s): 167x
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Despite its small size, this cluster can be found easily. When looking through the finderscope, it is sitting at the end of a very long path of bright stars. It consists only a small number of stars, yet the majority of these are quite bright with magnitudes somewhere between 7 and 11. Besides the 10 bright members, there are stars of at least the same number, within magnitudes 11 and 13.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1513 (Nyílthalmaz)
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Rektaszcenzió: 4h 10m
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Deklináció: 49° 31'
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Csillagkép: Perseus
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Dátum/idő: 2008.02.11 19:40 UT
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Műszer: 300/1500 Newton
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Látómező: 18'
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Nagyítás és szűrő(k): 167x
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Nyugodtság: 3/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Eleinte abban sem voltam biztos, hogy valóban a megfelelő objektumot rajzoltam, annyira jelentéktelennek tűnik a látómezőben, alig különül el környezetétől. Maroknyi fényes csillag alkotja a halmaz javát. 71x nagyításon két egymásba fonódó csillag-gyűrűként látszik, 167x egy közel szabályos hatszög válik a halmaz legfeltűnőbb részévé, melyet 6 közel azonos fényességű és színű, 12-13 magnitúdós csllag alkot. Bár nem túl feltűnő, könnyű pozíciója miatt megéri felkeresni.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1513 (Open cluster)
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Right ascension: 4h 10m
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Declination: 49° 31'
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Constellation: Perseus
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Date/time: 2008.02.11 19:40 UT
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Equipment: 12" f/5 Newtonian
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FoV: 18'
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Magnification and filter(s): 167x
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Seeing: 3/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
First I wasn't even sure that I'm sketching the right object, this open cluster looked so insignificant to me for the first look, but after looking up images in a internet database about it, it became clear, that my time wasn't just wasted and I sketced the right thing. Around halfway between lambda and mu Per, a handful of stars, that can hardly be called bright, make up this cluster. On a magnification of 71x it looks as if there were two rings of stars that are bound to eachother. On 167x an almost regular hexagon is the most notable part of the cluster, made up of six stars of similar luminosity and colour, of magnitudes 12-13. Although not too spectacular, because of its easy location it might worth to search and take a look at it.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1528 (Nyílthalmaz)
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Rektaszcenzió: 4h 15m
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Deklináció: 51° 13'
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Csillagkép: Perseus
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Dátum/idő: 2008.02.12 19:00 UT
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Műszer: 300/1500 Newton
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Látómező: 25'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 7/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Korábban egy holdmentes éjszakán tudtam leészlelni ezt a gyönyörű, sűrű nyílthalmazt, akkor kifejezetten grízesnek tűnt a háttere. Ez a hatás most elmaradt, bár a keresőben ígyis elmosódott, ködös kis pamacsként töndökölt, hála magas, 6,4 magnitúdós összfényességének. Bár holdas éjjelen is szép látvány, igazi karakterét sötét éjjeleken mutatja meg.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1528 (Open cluster)
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Right ascension: 4h 15m
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Declination: 51° 13'
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Constellation: Perseus
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Date/time: 2008.02.12 19:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 25'
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Magnification and filter(s): 71x
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Seeing: 7/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
I've had the opportunity to look at this beautiful, dense open cluster on "moonless" nights. Then it seemed to have a quite diffuse background. This effect was missing now, although I've seen it as a fuzzy, foggy spot even through the finderscope, thanks to its relatively high gross luminosity of around 6.4m. Although it's a splendid view even in moonlight, its real character can be seen only on really dark nights.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1545 (Nyílthalmaz)
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Egyéb elnevezés: Collinder 49 (Cr 49)
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Rektaszcenzió: 4h 21m
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Deklináció: 50° 15'
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Csillagkép: Perseus
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Dátum/idő: 2008.02.11 19:00 UT
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Műszer: 300/1500 Newton
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Látómező: 40'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 3/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Nem túl sűrű és egyáltalán nem látványos nyílthalmaz, számomra talán egyetlen látványos eleme a közepén tündöklő fényes csillagháromszög északi csillaga, mely szép piros/narancs színű. Környezete közepesen csillaggazdag, emiatt határa nehezen definiálható.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1545 (Open cluster)
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Also known as: Collinder 49 (Cr 49)
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Right ascension: 4h 21m
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Declination: 50° 15'
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Constellation: Perseus
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Date/time: 2008.02.11 19:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 40'
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Magnification and filter(s): 71x
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Seeing: 3/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This cluster is not too dense and not at all spectacular, for me its only charm was the northern star of the triangle made up of three bright stars with its nice red/orange colour. Its environs are moderately rich in stars, its boundaries are hardly noticeable, because it perfectly fades into its surroundings.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1662 (Nyílthalmaz)
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Rektaszcenzió: 4h 49m
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Deklináció: 10° 58'
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Csillagkép: Orion
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Dátum/idő: 2009.11.24 00:00 UT
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Műszer: 300/1500 Newton
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Látómező: 30'
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Nagyítás és szűrő(k): 100x
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Nyugodtság: 7/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Nagyon látványos, kis kiterjedésű nyílthalmaz az Orion csillagképben. Maroknyi csillag alkotja, ám ezek nagyon eltérő színűek, 9 magnitúdó körüli fényességgel. Legérdekesebb részlete talán a közepén látható paralelogramma. SQM: 21,0m/as^2.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1662 (Open cluster)
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Right ascension: 4h 49m
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Declination: 10° 58'
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Constellation: Orion
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Date/time: 2009.11.24 00:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 30'
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Magnification and filter(s): 100x
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Seeing: 7/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
A very spectacular little open cluster in the great Orion constellation. It has only a handful of stars, but they are very different in colour, with brightness in the 9m range. The most interesting part is the paralelogram in the middle. SQM reading: 21.0 m/arcsec2, 9°C.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1807 + NGC 1817 (Nyílthalmaz)
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Rektaszcenzió: 5h 11m
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Deklináció: 16° 31'
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Csillagkép: Andromeda
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Dátum/idő: 2008.01.31 18:30 UT
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Műszer: 300/1500 Newton
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Látómező: 1°
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Nagyítás és szűrő(k): 45x
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Nyugodtság: 7/10
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Átlátszóság: 4/5
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Helyszín: Nádasdladány, Nádasdladány
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Észlelő: Ferenc Lovró
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Leírás:
Nagy fába vágtam a fejszémet, mikor úgy döntöttem, hogy lerajzolom ezt a két nyílthalmazt: a rajzolás során újrakezdtem az egészet egyszer és abba akartam hagyni vagy háromszor. Az NGC 1807 a könnyebb eset: maroknyi fényes, 9-11 magnitúdós csillag adja a halmaz javát, mely leginkább egy repülő papírsárkányra hasonlít. A nehezebb az NGC 1817, a rajzon jobboldalt. Ennek is vannak fényes csillagai, ám igazi jellegét a rengeteg halvány, maximum 12-13 magnitúdós csillag adja meg. Észlelés közben sokuk tűnt elő elfordított látással, megnehezítve a pontos ábrázolást. Másfelől, ha nem rajzolni, csak gyönyörködni szeretnénk, arra kiválóan alkalmas ez a szép és könnyű célpont, melynek leészleléséhez mindenképp az elérhető legkisebb nagyítást érdemes használnunk.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1807 + NGC 1817 (Open cluster)
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Right ascension: 5h 11m
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Declination: 16° 31'
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Constellation: Andromeda
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Date/time: 2008.01.31 18:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 1°
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Magnification and filter(s): 45x
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Seeing: 7/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
I've started a big enterprise when I decided to sketch these two open clusters: during the long process of drawing I've restarted from scratch once and decided to abandon at least 3 times. NGC 1807 was the easier case: a handful of bright 9-11m stars give the most of the cluster, which has a figure in the middle of the field theat resembles me of a flying kite. The really hard case is the NGC 1817, seen on the right side of the image. It also has brighter stars, however its real image is shaped by the many stars fainter than 12-13 magnitudes. During sketching many stars emerged by using averted vision which made it even harder, especially when after sketching a couple of dots on paper, and turning back to the eyepiece one tries to pick up the line. On the other hand this double-cluster is a beautiful and easy target, that should be observed with lower magnifications.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2126 (Open cluster)
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Also known as: Herschel H68-8
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Right ascension: 6h 3m
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Declination: 49° 52'
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Constellation: Auriga
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Date/time: 2010.02.21 19:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 25'
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Magnification and filter(s): 100x
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Seeing: 6/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
A small, triangle shaped open cluster sitting in a sparse stellar environment. A very bright star dominates the cluster at one of its corners, but I suspect that this star is not actually a part of this group. Apart this, the cluster shows about a dozen of brighter and another dozen of fainter members.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2129 (Open cluster)
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Right ascension: 6h 2m
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Declination: 23° 19'
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Constellation: Gemini
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Date/time: 2009.02.22 21:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 13'
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Magnification and filter(s): 167x
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Seeing: 5/10
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Transparency: 2/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
At 71x it has a diametre of about 1/8th of that of the whole FoV, this means it's a quite small open cluster, clearly emerges from its environment. It contains two really bright stars (possible foreground stars) and at least two dozens of faint ones.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2169 (Open cluster)
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Right ascension: 6h 8m
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Declination: 13° 58'
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Constellation: Orion
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Date/time: 2008.01.28 19:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 7'
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Magnification and filter(s): 167x
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Seeing: 6/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
A rather small cluster, but still with many bright members in the constellation Orion. You can find it easily, tho a medium magnification will be neccessary to reveal fully its figure, that is made up of two separate parts. At the end of one of these patterns sitting a very close binary star, both stars with high magnitudes yet can be separated easily, even with a power of around 100x. This cluster is ofter referred as "The 37 cluster", as its stars form a large cosmic 37. :)
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2215 (Open cluster)
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Right ascension: 6h 21m
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Declination: -7° 18'
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Constellation: Monoceros
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Date/time: 2011.01.28 19:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 27'
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Magnification and filter(s): 100x
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Seeing: 8/10
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Transparency: 2/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Small, relatively compact open cluster that reminds me of some prehistoric stone axe. Consists about a dozen stars of the 11-12m range and some fainter ones. Not an easy object as its declination requires much work with a Dobsonian telescope. :) SQM reading: 20.6m/arcsec2, -9°C, high humidity.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2232 (Open cluster)
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Right ascension: 6h 27m
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Declination: -4° 45'
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Constellation: Monoceros
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Date/time: 2008.02.13 19:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 24'
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Magnification and filter(s): 71x
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
You can find this sparsely populated, large open cluster near the star ß Mon in Monoceros. In its center shines the star HR 2344 (HD 45546), which is a mag 5 star - therefore it is visible with the naked eye even from moderately dark places. The cluster has many members brighter than 10m, so it looks nice even through an ordinary finderscope, and because of its size and sparse density you shouldn't go for powers higher than 50-75x when looking at it.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2281 (Open cluster)
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Also known as: Cr 116
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Right ascension: 6h 48m
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Declination: 41° 5'
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Constellation: Auriga
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Date/time: 2008.01.24 19:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 15'
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Magnification and filter(s): 167x
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This open cluster can be located easily, yet it doesn't cover a large area. It has half-dozen brighter and at least 20 fainter members. Its most notable pattern is the diamond made up by four bright stars in the middle of the cluster. The OC is clearly separated from its environs.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2331 (Open cluster)
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Right ascension: 7h 8m
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Declination: 27° 15'
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Constellation: Gemini
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Date/time: 2011.03.23 20:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 35'
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Magnification and filter(s): 71x
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Seeing: 6/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Sparsely populated, faint open cluster, hardly separates from the surrounding starfield. Fills about one third of the FoV with about 5 brighter stars and many fainter members. Probably the only interesting feature of this cluster is the tiny circle of faint stars to the SSE of the centre of the cluster. But this feature alone makes it worth a visit. :)
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2355 (Open cluster)
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Right ascension: 7h 18m
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Declination: 18° 44'
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Constellation: Gemini
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Date/time: 2011.03.07 20:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 31'
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Magnification and filter(s): 100x
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Seeing: 6/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Faint compact open cluster in a very rich starfield, with a very faint diffuse background. Its diameter is about 5', looks perfectly round. SQM reading: 21.20 m/arcsec2, -9°C.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2420 (Open cluster)
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Right ascension: 7h 39m
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Declination: 21° 33'
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Constellation: Gemini
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Date/time: 2011.03.07 19:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 29'
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Magnification and filter(s): 100x
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Seeing: 6/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Very spectacular, yet quite compact cluster that shows a diffuse background, that is bright enough to be visible in the 8x50 finderscope as a tiny hazy spot. The environment is rich in stars, but the cluster is clearly separated. I estimate a visible diameter of about 4', but the cluster is drop-shaped, not round. SQM reading: 21.16 m/arcsec2, -5°C, bit humid air.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 6910 (Open cluster)
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Also known as: Rocking Horse cluster
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Right ascension: 20h 24m
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Declination: 40° 48'
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Constellation: Cygnus
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Date/time: 2009.06.19 00:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 12'
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Magnification and filter(s): 250x
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Seeing: 7/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This tinny little object is also known as the Rocking Horse cluster. The name says it all: it really looks like a little horse jumping around the space. Although it's in a quite easy position, it still is a neglected object, as when it comes to Cygnus, everyone thinks of nebulae like the Veil and its companions, and the tiny shiny planetaries. Too bad, because this cluster is a real gem! It's special features are the two brightest stars of the cluster (at the front leg and the eye), that are apparently yellow, even though their spectral class suggests a rather white colour. This optical illusion is caused by the interstellar dust that is so common through Cygnus. A very important hint: you should use a fairly high magnification when looking at this object, because it's located in a field that is rich in bright stars, which makes it harder to detect the real shape of the cluster.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 7160 (Open cluster)
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Right ascension: 21h 54m
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Declination: 62° 40'
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Constellation: Cepheus
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Date/time: 2010.10.09 19:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 19'
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Magnification and filter(s): 167x
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Seeing: 3/10
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Transparency: 5/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Appears in the finderscope as a fuzzy bright star near to another (real) star with similar brightness. This star can be seen in the sketch at NNW. Contains about a dozen bright stars but in the middle of the cluster I can see two stars that are noticeably brighter than the rest. Separates fine from its environment, no diffuse background can be detected. SQM reading: 21.08 m/arcsec2, 1°C, high humidity.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 7209 (Open cluster)
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Right ascension: 22h 5m
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Declination: 46° 30'
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Constellation: Lacerta
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Date/time: 2008.09.05 00:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 43'
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Magnification and filter(s): 45x
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Seeing: 5/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Huge, sparse open cluster, with a background of the sparkling of the faint stars of the Milkyway. Bordered from the North by the 6.2mag star SAO 51632, which makes it easier to find the cluster. It consists around two dozens of bright stars of nearly the same luminosity (between 10 and 11 magnitudes) and colour. For me its most spectacular feature is the shape of a mirrored S North from its centre. Requires little magnification and a very wide field of vision.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 7235 (Open cluster)
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Right ascension: 22h 13m
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Declination: 57° 20'
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Constellation: Cepheus
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Date/time: 2010.10.09 20:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 21'
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Magnification and filter(s): 167x
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Seeing: 4/10
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Transparency: 5/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
The open cluster can be seein in the upper right quarter of the FoV as a group of faint stars. It seems as if a winding tail connects the cluster to the East and this feature makes the object look very special. Separates fine from its surroundings. SQM reading: 21.14 m/arcsec2, 0°C, heavy humidity.
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Hi-resolution image: [ reversed sketch | original sketch ]
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Stock 10 (Open cluster)
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Right ascension: 5h 39m
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Declination: 37° 56'
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Constellation: Auriga
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Date/time: 2008.02.12 18:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 52'
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Magnification and filter(s): 45x
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Seeing: 7/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
If I wouldn't check this object out previously with my planetarium-software, I would most probably didn't even notice this sparsely populated open cluster through the telescope. Catalogues claim that it has a diameter of around 25', however it looks larger to me. Its three brightest 7m members rule the field of vision. Unfortunately at the time of this sketch, the Moon was in a phase of around 35%, painting the entire sky gray, which is probably the reason why I haven't noticed any stars brighter than 13m in the area even by using averted vision, no matter that there were an excellent seeing this time.
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Hi-resolution image: [ reversed sketch | original sketch ]
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Stock 23 (Open cluster)
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Right ascension: 3h 12m
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Declination: 60° 0'
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Constellation: Camelopardalis
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Date/time: 2008.02.20 19:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 20'
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Magnification and filter(s): 71x
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Seeing: 6/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This is a large open cluster with a diametre of around 15'. Not that spectacular, although it can be clearly distinguished from its environs that is relatively poor in stars. It has two separate shiny parts, with the brightest stars as shiny as 7.5-9 magnitudes, sparkling in all different colours. The Western part of the cluster has an optical double at its end towards the middle of the cluster that can be easily separated, and where both members are also real doubles in themselves. However, I could not resolve those doubles at this magnification level.
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Hi-resolution image: [ reversed sketch | original sketch ]
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Trumpler 1 (Open cluster)
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Also known as: Tr 1
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Right ascension: 1h 36m
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Declination: 61° 17'
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Constellation: Cassiopeia
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Date/time: 2008.02.19 19:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 18'
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Magnification and filter(s): 167x
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Seeing: 6/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
In the neighborhood of the M103 located this tiny but spectacular open cluster. 71x: the object probably looks the nicest on this magnification. It's notable figure is a little line formed by four stars of around the same (11-12) magnitude. 167x: the cluster itself is less spectacular on this power, however one of the four stars splits to a binary of two dim (13m) stars. The OC has an easy position, and is a very interesting, spectacular view, worth taking a look at it.
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Hi-resolution image: [ reversed sketch | original sketch ]
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Trumpler 2 (Open cluster)
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Right ascension: 2h 37m
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Declination: 55° 59'
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Constellation: Perseus
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Date/time: 2008.01.26 18:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 30'
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Magnification and filter(s): 71x
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Nice open cluster in the neighborhood of the famous double-cluster of the constellation Cassiopeia. It has a quite large diametre of 20'. Its most notable member is the 7.38 magnitude red giant star, HD 16068.
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Hi-resolution image: [ reversed sketch | original sketch ]
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Trumpler 3 + PNG138.1+04.1 (Open cluster)
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Also known as: Tr 3
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Right ascension: 3h 12m
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Declination: 63° 15'
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Constellation: Cassiopeia
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Date/time: 2008.01.26 20:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 45'
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Magnification and filter(s): 71x
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This open cluster is located in a star field that's free from bright stars. Its most remarkable figure reminds me of a reaping-hook, and is composed by four stars between magnitudes 9 and 10. These are also considered the brightest members of the cluster, besides these only a couple of stars of 8-10m are visible in the field of vision, but most of the members are fainter than 12m. For about 20' to the south is the planetary nebula PNG138.0+04.1, but its nebulosity can only be suspected even by using averted vision - the large, 5.5' diameter planetary cannot really be seen even with the UHC filter on. However, its 13m central star can be found and a little haziness can be detected next to this star that is probably illuminated by the brighter stars next to the central one.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 457 (Open cluster)
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Also known as: ET cluster, Owl cluster
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Right ascension: 1h 20m
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Declination: 58° 22'
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Constellation: Cassiopeia
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Date/time: 2011.12.08 23:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 40'
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Magnification and filter(s): 71x
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Seeing: 4/10
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Transparency: 1/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
I've already sketched this object about four years ago, actually it was one of my first sketches. That time the sky was great, but this time I decided to put it on paper when the conditions were definitely poor. The idea behind was to simulate the night sky conditions when I last saw this object earlier this year from Budapest, our highly light-polluted capitol. So the sketch was done with a full Moon and light clouds all over the sky. SQM reading: 15.98m/arcsec2, 3°C. Dedicated to my friend Györgyi, she knows why. ;)
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Hi-resolution image: [ reversed sketch | original sketch ]
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M36 (Nyílthalmaz)
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Egyéb elnevezés: NGC 1960
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Rektaszcenzió: 5h 37m
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Deklináció: 34° 9'
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Csillagkép: Auriga
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Dátum/idő: 2011.12.20 22:00 UT
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Műszer: 300/1500 Newton
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Látómező: 42'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 2/10
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Átlátszóság: 3/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Nagyon látványos objektum, könnyű megtalálni, tisztán kiemelkedik égi hátteréből. Nagy halmaz, tucatnyi fényes csillag uralja. Színeik enyhén különbözőek, némely fényesebb tag erősen narancs árnyalatú. SQM: 20,82m/as^2.
SQM reading: 20.82m/arcsec2, -6°C, slightly humid weather with NELM getting worse by every moment.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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M36 (Open cluster)
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Also known as: NGC 1960
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Right ascension: 5h 37m
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Declination: 34° 9'
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Constellation: Auriga
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Date/time: 2011.12.20 22:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 42'
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Magnification and filter(s): 71x
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Seeing: 2/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Very spectacular object that is easy to spot, clearly stands out from its background. Large cluster with about a dozen bright stars dominating the view. Their colours are slightly different, some of the brighter stars are strongly orange coloured. Finished just after midnight, Central European Time, so it's 12.21 already, hooray, it's my birthday! :D
SQM reading: 20.82m/arcsec2, -6°C, slightly humid weather with NELM getting worse by every moment.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1907 (Nyílthalmaz)
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Rektaszcenzió: 5h 29m
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Deklináció: 35° 20'
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Csillagkép: Auriga
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Dátum/idő: 2012.01.18 23:00 UT
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Műszer: 300/1500 Newton
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Látómező: 18'
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Nagyítás és szűrő(k): 250x
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Nyugodtság: 3/10
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Átlátszóság: 2/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
A híres, és gyakran felkeresett M 38 tőszomszédságában található ez a kevésbé észlelt kis ékkő. Mindenképp megéri felkeresni: tucatnyi aránylag fényes csillag uralja, ám a háttere is kifejezetten grízes, ködös. A körülményekhez képest a használt 250-szeres nagyítás túlzó, ám ezen véltem a legtöbb részletet felfedezni benne. SQM: 20,61m/as^2.
SQM reading: 20.61m/arcsec2, -5°C, extremely humid, terrible seeing.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1907 (Open cluster)
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Right ascension: 5h 29m
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Declination: 35° 20'
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Constellation: Auriga
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Date/time: 2012.01.18 23:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 18'
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Magnification and filter(s): 250x
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Seeing: 3/10
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Transparency: 2/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Very near the M38 cluster lies this little gem. Often ignored as its famous neighbour grabs all the attention, but it still worth observing this tiny cluster. Dominated by some dozens of stars, but a foggy background can also be seen. The 250x power is a bit of an exaggeration, but I found this the best to see all the details.
SQM reading: 20.61m/arcsec2, -5°C, extremely humid, terrible seeing.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M38 (Nyílthalmaz)
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Egyéb elnevezés: NGC 1912
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Rektaszcenzió: 5h 30m
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Deklináció: 35° 52'
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Csillagkép: Auriga
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Dátum/idő: 2012.01.20 22:45 UT
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Műszer: 300/1500 Newton
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Látómező: 42'
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Nagyítás és szűrő(k): 71x
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Nyugodtság: 3/10
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Átlátszóság: 4/5
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Ezen a nagyításon kitölti a látómezőt. Hatalmas halmaz, kiegyensúlyozott mennyiségben tartalmaz fényes és halvány csillagokat. Könnyű célpont kis távcsövekben és binokulárokban is. Hatalmas látómezejű távcsövekben gyönyörű látvány lehet a közeli M36-tal és M37-tel együtt. SQM: 20,97m/as^2.
SQM reading: 20.97m/arcsec2, -2°C, strong wind, humid air, conditions far from ideal.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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M38 (Open cluster)
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Also known as: NGC 1912
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Right ascension: 5h 30m
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Declination: 35° 52'
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Constellation: Auriga
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Date/time: 2012.01.20 22:45 UT
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Equipment: 12" f/5 Newtonian
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FoV: 42'
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Magnification and filter(s): 71x
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Seeing: 3/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
At this level of magnification it fills the FoV. Huge cluster with well balanced amount of bright and fainter stars all around. Easily visible with tiny telescopes or binoculars, looks wonderful together with M36 and M37 in scopes with huge FoV.
SQM reading: 20.97m/arcsec2, -2°C, strong wind, humid air, conditions far from ideal.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M37 (Open cluster)
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Also known as: NGC 2099
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Right ascension: 5h 53m
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Declination: 32° 33'
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Constellation: Auriga
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Date/time: 2012.01.20 23:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 45'
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Magnification and filter(s): 71x
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Seeing: 3/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Very nice cluster that is well populated with faint little stars that are very identical in both brightness and colour (bluish gray), with maybe one or two brighter stars in the middle. I can notice several star paths in the cluster. Very difficult to sketch.
SQM reading: 21.06m/arcsec2, -2°C, very strong wind.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 6802 (Open cluster)
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Right ascension: 19h 31m
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Declination: 20° 18'
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Constellation: Vulpecula
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Date/time: 2012.06.16 0:35 UT
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Equipment: 12" f/5 Newtonian
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FoV: 22'
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Magnification and filter(s): 167x
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Seeing: 6/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
In the neighborhood of the famous Coathanger asterism lies this rather small, asymmetrical, faint open cluster. It's very spectacular thanks to its mysterious silver glow. About 8 to 10 cluster members are visible with direct vision, however plenty of stars are on the edge of visibility when looking with averted vision. These and the invisible companions are responsible for the shiny background glow that is elongated in the N-S direction and sometimes looking very elliptical. Despite it being very faint - or perhaps that is the reason - it is a very remarkable cluster.
SQM reading: 21.27 MPSAS, 11°C, humid.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 6823 (Open cluster)
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Right ascension: 19h 44m
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Declination: 23° 20'
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Constellation: Vulpecula
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Date/time: 2012.06.17 0:20 UT
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Equipment: 12" f/5 Newtonian
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FoV: 32'
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Magnification and filter(s): 167x
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Seeing: 6/10
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Transparency: 4/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
I've discovered this little gem while wandering in the Milky Way and identified later on the map as NGC 6823. It's most interesting part is the little triangle of stars between two bright stars right in the middle of the cluster. The cluster itself is very sparse, doesn't contain many stars, however it clearly isolates well from the background.
SQM reading: 21.22 MPSAS, 13°C.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M39 (Open cluster)
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Also known as: NGC 7092
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Right ascension: 21h 32m
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Declination: 48° 29'
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Constellation: Cygnus
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Date/time: 2012.06.23 0:00 UT
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Equipment: 4.5" f/8 Newtonian
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FoV: 50'
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Magnification and filter(s): 43x
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Seeing: 7/10
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Transparency: 4/5
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Location: Lipótfa, Zselic, Hungary
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Observer: Ferenc Lovró
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Description:
Sparsely populated, very large and very bright cluster, already visible with my tiny finderscope, nicely sitting in front of the Milky Way. Contains about a dozen bright stars with various luminosity. Has a fuzzy background to the NE thanks to out galaxy. This is my first sketch from Lipótfa, a tiny village surrounded by the Zselic Starry Sky Park - one of Europe's first Starry Sky Parks.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 6791 (Open cluster)
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Right ascension: 19h 21m
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Declination: 37° 48'
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Constellation: Lyra
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Date/time: 2012.07.15 21:45 UT
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Equipment: 4.5" f/8 Newtonian
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FoV: 1° 12'
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Magnification and filter(s): 60x
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Seeing: 4/10
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Transparency: 4/5
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Location: Lipótfa, Zselic, Hungary
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Observer: Ferenc Lovró
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Description:
With my small telescope this is a pretty hard object despite the great dark sky we have in our second home in the Zselic. With direct vision it's almost invisible, however by moving the scope all around you can notice a diffuse, silver glow. With averted vision I'm able to see even some details. Higher magnifications vanish the object.
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Hi-resolution image: [ reversed sketch | original sketch ]
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Stephenson 1 (Open cluster)
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Right ascension: 18h 55m
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Declination: 36° 53'
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Constellation: Lyra
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Date/time: 2012.07.15 22:30 UT
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Equipment: 4.5" f/8 Newtonian
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FoV: 33'
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Magnification and filter(s): 100x
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Seeing: 4/10
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Transparency: 4/5
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Location: Lipótfa, Zselic, Hungary
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Observer: Ferenc Lovró
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Description:
Very sparsely populated cluster around the bright star of Delta Lyrae. Apart from that, three other bright stars dominate the FoV. No diffuse background can be detected.
SQM reading: 21.42 MPSAS, 8°C (freezing cold for a midsummer day ;) )
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 7510 (Open cluster)
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Right ascension: 23h 12m
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Declination: 60° 39'
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Constellation: Cepheus
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Date/time: 2012.09.11 23:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 23'
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Magnification and filter(s): 167x
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Seeing: 6/10
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Transparency: 2/5
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SQM: 21.30 m/as2
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Temperature: 10°C
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Humidity: moderate
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Wind: none
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Sight: 3 - definite details, interesting look
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 4 - hard, complex starhopping needed
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
A rather small open cluster that separates nicely from its background. It has a definite "V" shape pointing to the WSW. To find it you need to star hop from the M52 cluster by using some faint stars - an uneasy voyage. As it has only a few brighter members, perhaps it's an easy to miss object with smaller scopes.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 637 (Open cluster)
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Right ascension: 1h 44m
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Declination: 64° 6'
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Constellation: Cassiopeia
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Date/time: 2012.11.03 19:45 UT
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Equipment: 4.5" f/8 Newtonian
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FoV: 21'
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Magnification and filter(s): 180x
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Seeing: 8/10
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Transparency: 2/5
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SQM: 20.06 m/as2
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Temperature: 13°C
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Humidity: low
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Wind: none
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Sight: 2 - minor details, somewhat interesting
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Difficulty: 2 - easily visible, some dark adaptation needed, averted vision might add to details
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Position: 2 - easy, bright star nearby
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Location: Lipótfa, Zselic, Hungary
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Observer: Ferenc Lovró
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Description:
Tiny little open cluster, compact but sparsely populated. I assume that only 8 of the stars in the FoV are the members of this OC. The full moonjust below my horizon is quickly ruining the sky background, worth taking a look under more favorable conditions, because I suspect that what I see is only a minor part of what I could really observe with this scope.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M35 (Open cluster)
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Also known as: NGC 2168
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Right ascension: 6h 10m
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Declination: 24° 21'
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Constellation: Gemini
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Date/time: 2012.12.30 18:00 UT
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Equipment: 4.5" f/8 Newtonian
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FoV: 47'
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Magnification and filter(s): 60x
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Seeing: 6/10
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Transparency: 4/5
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SQM: 19.67 m/as2
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Temperature: -5°C
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Humidity: dry
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Wind: none
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Sight: 4 - lots of details, very interesting, unique look
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Difficulty: 1 - instantly visible, no dark adaptation or averted vision needed
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Position: 2 - easy, bright star nearby
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Location: Lipótfa, Zselic, Hungary
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Observer: Ferenc Lovró
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Description:
A very nice, large open cluster, covers half the FoV, nicely separates from its stellar neighborhood. I count 8 brighter and dozens of fainter stars in the cluster. There are two especially nice features: one of them is the stellar arc between two brighter stars in the middle of the sketch, and the other one is the nice trapezoid of stars right above this arc. Full moon is getting closer and closer to the cloud-covered horizon preventing me from further observation.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M41 (Open cluster)
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Right ascension: 6h 47m
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Declination: -2° 47'
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Constellation: Canis Major
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Date/time: 2013.03.02 18:30 UT
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Equipment: 4.5" f/8 Newtonian
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FoV: 52'
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Magnification and filter(s): 60x
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Seeing: 8/10
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Transparency: 4/5
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SQM: 21.32 m/as2
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Temperature: 4°C
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Humidity: dry
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Wind: none
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Sight: 2 - minor details, somewhat interesting
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Difficulty: 1 - instantly visible, no dark adaptation or averted vision needed
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Position: 2 - easy, bright star nearby
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Location: Lipótfa, Zselic, Hungary
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Observer: Ferenc Lovró
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Description:
Sparsely populated, large open cluster just under the bright star Sirius. It can be detected with the unaided eye as a faint little spot. It contains about a dozen bright stars and about two dozens of fainter companions.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M93 (Open cluster)
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Right ascension: 7h 45m
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Declination: -2° 53'
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Constellation: Puppis
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Date/time: 2013.03.02 19:15 UT
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Equipment: 4.5" f=8 Newtonian
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FoV: 37'
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Magnification and filter(s): 100x
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Seeing: 6/10
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Transparency: 4/5
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SQM: 21.32 m/as2
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Temperature: -4°C
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Humidity: low
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Wind: none
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Sight: 2 - minor details, somewhat interesting
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 3 - moderate, some starhopping needed
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Location: Lipótfa, Zselic, Hungary
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Observer: Ferenc Lovró
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Description:
Small, compact open cluster, mostly made of faint stars. If I turn off my observers torch, the FoV is full of fainter stars - not a surprise as the Milky Way creates the background for this object.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M46 (Open cluster)
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Right ascension: 7h 42m
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Declination: -1° 51'
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Constellation: Puppis
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Date/time: 2013.03.02 20:00 UT
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Equipment: 4.5" f/8 Newtonian
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FoV: 1° 2'
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Magnification and filter(s): 60x
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Seeing: 6/10
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Transparency: 4/5
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SQM: 21.36 m/as2
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Temperature: -8°C
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Humidity: low
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Wind: none
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Sight: 3 - definite details, interesting look
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Difficulty: 4 - hardly visible, dark adaptation and very dark skies needed, averted vision is required to see details
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Position: 3 - moderate, some starhopping needed
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Location: Lipótfa, Zselic, Hungary
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Observer: Ferenc Lovró
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Description:
This open cluster is made of plenty of faint stars. Many visible with direct vision, but the majority of even fainter stars are visible only with averted vision. It separates well from its background, but it's definitely not an easy object just next to the much brighter M47.
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Hi-resolution image: [ reversed sketch | original sketch ]
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M47 (Open cluster)
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Right ascension: 7h 37m
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Declination: -1° 31'
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Constellation: Puppis
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Date/time: 2013.03.02 20:30 UT
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Equipment: 4.5" f/8 Newtonian
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FoV: 57'
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Magnification and filter(s): 60x
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Seeing: 6/10
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Transparency: 4/5
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SQM: 21.36 m/as2
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Temperature: -9°C
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Humidity: low
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Wind: none
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Sight: 3 - definite details, interesting look
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Difficulty: 1 - instantly visible, no dark adaptation or averted vision needed
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Position: 3 - moderate, some starhopping needed
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Location: Lipótfa, Zselic, Hungary
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Observer: Ferenc Lovró
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Description:
Large, loose open cluster with many faint members, near the much fainter M46 open cluster. This object has fewer stars, yet it still looks a lot brighter. I'm getting frozen now.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1664 (Nyílthalmaz)
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Rektaszcenzió: 4h 52m
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Deklináció: 43° 42'
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Csillagkép: Auriga
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Dátum/idő: 2014.03.08 20:45 UT
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Műszer: 300/1500 Newton
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Látómező: 36'
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Nagyítás és szűrő(k): 100x
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Nyugodtság: 7/10
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Átlátszóság: 2/5
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SQM: 17.95 m/as2
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Hőmérséklet: 6°C
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Páratartalom: közepes
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Szél: széllökések
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Látvány: 4 - sok részlet, nagyon érdekes, egyedi kinézet
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Nehézség: 3 - közepesen látható, de sötétadaptáció szükséges, elfordított látás javíthat a részleteken
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Pozíció: 1 - nagyon könnyű, sok fényes csillag a közelben
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Halvány, kiterjedt nyílthalmaz, közel egyenlő fényességű tagokkal. Gyér populációjú, ám számos érdekes csillag-ösvényt tartalmaz. Igazán szép objektum, nagyszerű célpont lehet egy sötétebb, holdmentes éjszakán.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1664 (Open cluster)
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Right ascension: 4h 52m
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Declination: 43° 42'
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Constellation: Auriga
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Date/time: 2014.03.08 20:45 UT
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Equipment: 12" f/5 Newtonian
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FoV: 36'
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Magnification and filter(s): 100x
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Seeing: 7/10
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Transparency: 2/5
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SQM: 17.95 m/as2
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Temperature: 6°C
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Humidity: moderate
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Wind: gusts
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Sight: 4 - lots of details, very interesting, unique look
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 1 - very easy, many bright stars nearby
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Faint, large open cluster with member stars of very similar brightness. Sparsely populated, yet it features many spectacular stellar paths. A really nice object, should make a great target on a better evening. In the Eastern corner of the FoV I can see a really nice, perfectly square pattern of stars. The Half Moon is near the Auriga constellation, and sometimes stormy wind gusts make observation harder.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 6811 (Nyílthalmaz)
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Rektaszcenzió: 19h 37m
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Deklináció: 46° 25'
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Csillagkép: Cygnus
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Dátum/idő: 2014.08.17 22:45 UT
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Műszer: 300/1500 Newton
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Látómező: 37'
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Nagyítás és szűrő(k): 100x
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Nyugodtság: 5/10
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Átlátszóság: 3/5
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SQM: 20.90 m/as2
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Hőmérséklet: 9°C
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Páratartalom: közepes
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Szél: nincs
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Látvány: 4 - sok részlet, nagyon érdekes, egyedi kinézet
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Nehézség: 3 - közepesen látható, de sötétadaptáció szükséges, elfordított látás javíthat a részleteken
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Pozíció: 3 - közepes, némi csillagról-csillagra ugrálás szükséges
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Helyszín: Nádasdladány, Hungary
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Észlelő: Ferenc Lovró
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Leírás:
Közepes méretű, hátterétől jól elkülönülő nyílthalmaz. A környező Tejút grízessé varázsolja a csillagoktól hemzsegő látómezőt. Mintha sok csáp alkotná ezt a viszonylag gazdag objektumot. Tőle nyugatra egy fényes csillagok alkotta aszterizmus található, ennek egyik tagja látható a látómezőrajz tetején.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 6811 (Open cluster)
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Right ascension: 19h 37m
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Declination: 46° 25'
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Constellation: Cygnus
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Date/time: 2014.08.17 22:45 UT
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Equipment: 12" f/5 Newtonian
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FoV: 37'
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Magnification and filter(s): 100x
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Seeing: 5/10
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Transparency: 3/5
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SQM: 20.90 m/as2
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Temperature: 9°C
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Humidity: moderate
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Wind: none
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Sight: 4 - lots of details, very interesting, unique look
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 3 - moderate, some starhopping needed
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Middle-sized open cluster, nicely separating from its background, which looks grainy because of the miriads of unseen Milkyway stars. This rich object contains several tentacles of stars. To the West of this OC I see an asterism of bright stars, one of its members can be seen on the topmost part of the sketch.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 7062 (Open cluster)
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Right ascension: 21h 24m
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Declination: 46° 27'
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Constellation: Cygnus
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Date/time: 2014.09.28 22:55 UT
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Equipment: 12" f/5 Newtonian
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FoV: 20'
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Magnification and filter(s): 167x
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Seeing: 5/10
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Transparency: 2/5
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SQM: 21.08 m/as2
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Temperature: 7°C
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Humidity: high
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Wind: breeze
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Sight: 3 - definite details, interesting look
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 4 - hard, complex starhopping needed
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
NGC 7062 is a small but rich open cluster. At low power it appears as a nice, silver colored round spot. Contains a few bright and plenty (at least 20) of fainter stars. Very spectacular, well separated cluster, unfortunately the strong dew makes the observation of this object difficult.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 6939 (Open cluster)
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Right ascension: 20h 32m
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Declination: 60° 43'
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Constellation: Cepheus
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Date/time: 2014.09.29 22:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 21'
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Magnification and filter(s): 167x
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Seeing: 4/10
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Transparency: 4/5
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SQM: 21.22 m/as2
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Temperature: 5°C
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Humidity: low
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Wind: breeze
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Sight: 4 - lots of details, very interesting, unique look
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Difficulty: 4 - hardly visible, dark adaptation and very dark skies needed, averted vision is required to see details
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Position: 3 - moderate, some starhopping needed
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This marvelous open cluster is instantly spectacular in the FoV. It's located near the NGC 6946 galaxy. NGC 6939 seems to have a cone-shape to the West. Splits to uncountable number of faint stars, a very rich cluster. A really nice object, but definitely needs dark, clear skies and a large telescope to appear as a showpiece cluster.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 6940 (Open cluster)
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Right ascension: 20h 34m
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Declination: 28° 30'
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Constellation: Vulpecula
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Date/time: 2014.10.20 20:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 1° 7'
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Magnification and filter(s): 50x
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Seeing: 3/10
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Transparency: 2/5
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SQM: 21.22 m/as2
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Temperature: 11°C
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Humidity: high
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Wind: gusts
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Sight: 3 - definite details, interesting look
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Difficulty: 2 - easily visible, some dark adaptation needed, averted vision might add to details
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Position: 2 - easy, bright star nearby
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Although the giant open cluster, NGC 6940 is mostly made of faint stars, it is shown by the finderscope because it's accumulated brightness is so high. Even its brightest members are fairly faint, but the majority of its stars are on the edge of direct vision. Spectacular object, moderately well separated from its environment.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1245 (Nyílthalmaz)
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Rektaszcenzió: 3h 15m
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Deklináció: 47° 3'
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Csillagkép: Perseus
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Dátum/idő: 2014.12.23 23:00 UT
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Műszer: 300/1500 Newton
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Látómező: 31'
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Nagyítás és szűrő(k): 100x
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Nyugodtság: 4/10
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Átlátszóság: 3/5
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SQM: 21.02 m/as2
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Páratartalom: alacsony
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Szél: szellő
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Látvány: 3 - határozott részletek, érdekes látvány
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Nehézség: 3 - közepesen látható, de sötétadaptáció szükséges, elfordított látás javíthat a részleteken
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Pozíció: 3 - közepes, némi csillagról-csillagra ugrálás szükséges
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Helyszín: Nádasdladány, Magyarország
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Észlelő: Ferenc Lovró
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Leírás:
Nagyon halvány csillagok alkotják ezt a nyílthalmazt, csillagokban gazdag környezetben. Ettől természetesen kifejezetten nehézzé válik észlelése, bár meglepő módon aránylag jól elkülönül. Grízes háttér, és rendkívül kis méret jellemzi.
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Nagyfelbontású képek: [ inverz rajz | eredeti rajz ]
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NGC 1245 (Open cluster)
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Right ascension: 3h 15m
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Declination: 47° 3'
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Constellation: Perseus
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Date/time: 2014.12.23 23:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 31'
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Magnification and filter(s): 100x
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Seeing: 4/10
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Transparency: 3/5
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SQM: 21.02 m/as2
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Humidity: low
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Wind: breeze
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Sight: 3 - definite details, interesting look
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 3 - moderate, some starhopping needed
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This open cluster consists faint stars in a stellar-rich neighborhood. This doesn't make its observation easier, yet it separates quite well from its environment. It has a fuzzy background and a quite small angular diameter.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2266 (Open cluster)
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Right ascension: 6h 43m
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Declination: 27° 00'
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Constellation: Gemini
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Date/time: 2014.12.24 00:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 12'
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Magnification and filter(s): 214x
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Seeing: 4/10
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Transparency: 3/5
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SQM: 21.12 m/as2
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Temperature: -2°C
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Humidity: low
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Wind: none
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Sight: 3 - definite details, interesting look
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 2 - easy, bright star nearby
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
A rich cluster of very faint stars. Nice one, with fuzzy background. Tiny by size and separates well from its neighborhood.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 1444 (Open cluster)
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Right ascension: 3h 51m
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Declination: 52° 42'
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Constellation: Perseus
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Date/time: 2015.11.12 23:10 UT
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Equipment: 12" f/5 Newtonian
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FoV: 9'
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Magnification and filter(s): 250x
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Seeing: 4/10
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Transparency: 4/5
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SQM: 21.09 m/as2
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Temperature: 6°C
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Humidity: dry
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Wind: none
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Sight: 1 - nothing spectacular
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Difficulty: 4 - hardly visible, dark adaptation and very dark skies needed, averted vision is required to see details
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Position: 4 - hard, complex starhopping needed
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Location: Talpa Minor Observatory
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Observer: Ferenc Lovró
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Description:
Tiny, featureless open cluster. At small magnification the most remarkable part is the tight binary in the centre of this sketch. By increasing power, this binary is no longer that spectacular, however the stellar path running down at the Eastern side of the cluster is more pronounced with the four stars nearly in-line. This won't be anyone's favourite open cluster I guess. ;)
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 7686 (Open cluster)
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Also known as: Herschel H69-8
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Right ascension: 23h 31m
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Declination: 49° 14'
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Constellation: Andromeda
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Date/time: 2015.12.30 18:45 UT
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Equipment: 12" f/5 Newtonian
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FoV: 15'
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Magnification and filter(s): 150x
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Seeing: 3/10
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Transparency: 3/5
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SQM: 20.96 m/as2
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Temperature: -6°C
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Humidity: low
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Wind: breeze
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Sight: 1 - nothing spectacular
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Difficulty: 2 - easily visible, some dark adaptation needed, averted vision might add to details
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Position: 3 - moderate, some starhopping needed
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Location: Talpa Minor Observatory
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Observer: Ferenc Lovró
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Description:
Somewhat unimportant open cluster with 2 very bright stars in the middle, and a dozen of fainter companions around and in between. Averted vision doesn't reveal more members.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 7128 (Open cluster)
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Right ascension: 21h 45m
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Declination: 53° 48'
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Constellation: Cygnus
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Date/time: 2016.06.06 23:25 UT
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Equipment: 12" f/5 Newtonian
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FoV: 14'
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Magnification and filter(s): 214x
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Seeing: 7/10
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Transparency: 3/5
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SQM: 21.01 m/as2
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Temperature: 12°C
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Humidity: moderate
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Wind: none
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Sight: 3 - definite details, interesting look
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Difficulty: 1 - instantly visible, no dark adaptation or averted vision needed
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Position: 4 - hard, complex starhopping needed
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Location: Talpa Minor Observatory
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Observer: Ferenc Lovró
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Description:
Interesting, gem-shaped tiny open cluster. Has many colourful stars, difficult to locate due to the high number of nearby faint stars. Looks rather asterism-like.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 381 (Open cluster)
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Right ascension: 01h 10m
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Declination: 61° 41'
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Constellation: Cassiopeia
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Date/time: 2017.10.17 19:55 UT
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Equipment: 12" f/5 Newtonian
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FoV: 11'
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Magnification and filter(s): 214x
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Seeing: 6/10
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Transparency: 2/5
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SQM: 20.55 m/as2
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Temperature: 12°C
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Humidity: high
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Wind: none
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Sight: 2 - minor details, somewhat interesting
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 2 - easy, bright star nearby
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Location: Talpa Minor Observatory
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Observer: Ferenc Lovró
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Description:
This sparse open cluster has a population of faint stars, nearly all of them has identical brightness. Contains about 30 stars, although probably there would be more if the sky background was less bright. Barely separates from its stellar neighborhood at small magnification, increasing the power makes it easier to separate. I detect no hint of a diffuse background.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 559 (Open cluster)
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Right ascension: 01h 31m
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Declination: 63° 24'
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Constellation: Cassiopeia
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Date/time: 2017.10.17 20:20 UT
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Equipment: 12" f/5 Newtonian
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FoV: 14'
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Magnification and filter(s): 250x
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Seeing: 6/10
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Transparency: 2/5
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SQM: 20.71 m/as2
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Temperature: 10°C
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Humidity: high
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Wind: none
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Sight: 2 - minor details, somewhat interesting
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Difficulty: 4 - hardly visible, dark adaptation and very dark skies needed, averted vision is required to see details
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Position: 2 - easy, bright star nearby
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Location: Talpa Minor Observatory
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Observer: Ferenc Lovró
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Description:
This loose, compact cluster is populated by very faint stars. In the middle a brighter triangle can be seen surrounded by about two dozens of fainter members. At 71x it separates better from its environment that is surprisingly poor in stars, however I need to push the magnification to resolve the faint cluster members. The high humidity makes the sky background very bright, I suspect a much better view if the conditions are great.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 744 (Open cluster)
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Right ascension: 02h 00m
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Declination: 55° 34'
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Constellation: Perseus
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Date/time: 2017.10.19 19:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 21'
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Magnification and filter(s): 167x
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Seeing: 6/10
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Transparency: 3/5
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SQM: 21.31 m/as2
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Temperature: 7°C
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Humidity: high
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Wind: none
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Sight: 2 - minor details, somewhat interesting
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 3 - moderate, some starhopping needed
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Location: Talpa Minor Observatory
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Observer: Ferenc Lovró
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Description:
Small open cluster. The brightness of its members is highly varying: numerous faint and some bright stars make this cluster up. Located in an environment that is rich in stars, so it's very difficult to separate from its neighborhood. It's the typical example of a cluster that an artificial intelligence wouldn't be able to recognize, but for the human eye (and brain) it is very easy to see.
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Hi-resolution image: [ reversed sketch | original sketch ]
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