NGC 2392 (Planetary nebula)
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Also known as: Caldwell C39, Herschel H45-4, Eskimo or Clown Face Nebula
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Right ascension: 7h 30m
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Declination: 20° 53'
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Constellation: Gemini
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Date/time: 2010.02.21 20:00 UT
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Equipment: 12" f/5 Newtonian
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FoV: 11'
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Magnification and filter(s): 300x + UHC filter(s)
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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 sketched this planetary about a year ago, but obviously I did not mark it as "SKETCHED" in my list of objects, so the result is a new drawing. However, when I compared the two sketches, it was obvious to make this mistake, because now - even if conditions were not ideal thanks to the 50% Moon nearby - I was able to see and record much more details: the brighter arcs around the central star were not at all visible for me, but now they were easily noticeable. The UHC filter was not neccessary to observe this object, however it boosted the intensity of the brighter central bubble.
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Hi-resolution image: [ reversed sketch | original sketch ]
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NGC 2392 (Planetary nebula)
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Also known as: Eskimo nebula, Clown face nebula
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Right ascension: 7h 30m
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Declination: 20° 54'
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Constellation: Gemini
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Date/time: 2009.01.24 18:40 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: 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:
Also known as the Eskimo or Clown face nebula, this planetary is the real gem of the constellation Gemini. It's a very bright object, showing much details and is quite unresponsive on filters. I estimate the brightness of its tiny, star-like core about 11 magnitudes, with two perfectly regular concentric circles around it, each with surface brightnesses about 1 magnitudes fainter than this. The diametre of the inner circle seems exactly the half of the entire object.
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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 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 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 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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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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NGC 2371 + NGC 2372 (Planetary nebula)
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Also known as: Gemini nebula
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Right ascension: 7h 26m
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Declination: 29° 29'
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Constellation: Gemini
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Date/time: 2014.01.03 23:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: '
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Magnification and filter(s): 250x + UHC + O-III filter(s)
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Seeing: 5/10
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Transparency: 3/5
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SQM: 20.97 m/as2
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Temperature: -7°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: 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 tiny, faint planetary nebula in the constellation Gemini, a relatively easy find. Its double lobed shape can be recognized even with very small magnifications (at 71x its shape was very obvious), but shows much more details with high powers. In the two parts two star-like false cores can be seen. Its Northern half looks a bit triangular, while its Southern half appears to grow significantly to SE when using averted vision. UHC filter helps a little but is not necessary and ruins the looks of the stellar neighborhood while an O-III makes it even fainter so is not recommended.
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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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