Similarly, many a young man, hearing for the first time of the refraction of stellar light, has thought that doubt was cast on the whole of astronomy, whereas nothing is required but an easily effected and unimportant correction to put everything right again.
/ Ernst Mach /



In memoriam Halton C. Arp (1927-2013).


My astronomy sketches. Hover mouse over image for the inverted look. For fainter objects, take a look at the black-on-white original, sometimes it reveals more details.


Need advice? Want to discuss an observation? Feel free to contact me at flovro gmail*com.

ÚJ! Amennyiben elérhetġ, a ikonra kattintva magyarul is olvashatod az észlelést.


Show me the newest sketches!
By type: open clusters [67] globular clusters [14] diffuse nebulae [3] dark nebulae [0] planetary nebulae [27] variable stars [18] binary stars [23] asterisms [2] galaxies [119] quasars [1] planets [2] minor planets [1] comets [5] Sun [0] Moon [5] other objects [8]
By catalogue: Messier 1-50 [20] Messier 51-110 [18] NGC 1-1000 [17] NGC 1001-2000 [21] NGC 2001-3000 [32] NGC 3001-4000 [25] NGC 4001-5000 [18] NGC 5001-6000 [22] NGC 6001-7000 [40] NGC 7001-7840 [35] IC 1-5386 [1] other catalogues [71] uncataloged [10] [25]
By constellation:



NGC 2392 (Planetary nebula)
Also known as: Caldwell C39, Herschel H45-4, Eskimo or Clown Face Nebula
Right ascension: 7h 30m Declination: 20° 53'
Constellation: Gemini
Date/time: 2010.02.21 20:00 UT
Equipment: 12" f/5 Newtonian
FoV: 11' Magnification and filter(s): 300x + UHC filter(s)
Seeing: 7/10 Transparency: 3/5
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
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.


Hi-resolution image: [ reversed sketch | original sketch ]

NGC 2392 (Planetary nebula)
Also known as: Eskimo nebula, Clown face nebula
Right ascension: 7h 30m Declination: 20° 54'
Constellation: Gemini
Date/time: 2009.01.24 18:40 UT
Equipment: 12" f/5 Newtonian
FoV: 15' Magnification and filter(s): 167x
Seeing: 6/10 Transparency: 3/5
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
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.


Hi-resolution image: [ reversed sketch | original sketch ]

NGC 2129 (Open cluster)
Right ascension: 6h 2m Declination: 23° 19'
Constellation: Gemini
Date/time: 2009.02.22 21:00 UT
Equipment: 12" f/5 Newtonian
FoV: 13' Magnification and filter(s): 167x
Seeing: 5/10 Transparency: 2/5
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
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.


Hi-resolution image: [ reversed sketch | original sketch ]

NGC 2420 (Open cluster)
Right ascension: 7h 39m Declination: 21° 33'
Constellation: Gemini
Date/time: 2011.03.07 19:00 UT
Equipment: 12" f/5 Newtonian
FoV: 29' Magnification and filter(s): 100x
Seeing: 6/10 Transparency: 4/5
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
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.


Hi-resolution image: [ reversed sketch | original sketch ]

NGC 2355 (Open cluster)
Right ascension: 7h 18m Declination: 18° 44'
Constellation: Gemini
Date/time: 2011.03.07 20:00 UT
Equipment: 12" f/5 Newtonian
FoV: 31' Magnification and filter(s): 100x
Seeing: 6/10 Transparency: 4/5
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
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.


Hi-resolution image: [ reversed sketch | original sketch ]

NGC 2331 (Open cluster)
Right ascension: 7h 8m Declination: 27° 15'
Constellation: Gemini
Date/time: 2011.03.23 20:00 UT
Equipment: 12" f/5 Newtonian
FoV: 35' Magnification and filter(s): 71x
Seeing: 6/10 Transparency: 4/5
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
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. :)


Hi-resolution image: [ reversed sketch | original sketch ]

M35 (Open cluster)
Also known as: NGC 2168
Right ascension: 6h 10m Declination: 24° 21'
Constellation: Gemini
Date/time: 2012.12.30 18:00 UT
Equipment: 4.5" f/8 Newtonian
FoV: 47' Magnification and filter(s): 60x
Seeing: 6/10 Transparency: 4/5
SQM: 19.67 m/as2 Temperature: -5°C
Humidity: dry Wind: none
Sight: 4 - lots of details, very interesting, unique look
Difficulty: 1 - instantly visible, no dark adaptation or averted vision needed
Position: 2 - easy, bright star nearby
Location: Lipótfa, Zselic, Hungary
Observer: Ferenc Lovró
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.


Hi-resolution image: [ reversed sketch | original sketch ]

NGC 2371 + NGC 2372 (Planetary nebula)
Also known as: Gemini nebula
Right ascension: 7h 26m Declination: 29° 29'
Constellation: Gemini
Date/time: 2014.01.03 23:30 UT
Equipment: 12" f/5 Newtonian
FoV: ' Magnification and filter(s): 250x + UHC + O-III filter(s)
Seeing: 5/10 Transparency: 3/5
SQM: 20.97 m/as2 Temperature: -7°C
Humidity: low Wind: none
Sight: 3 - definite details, interesting look
Difficulty: 4 - hardly visible, dark adaptation and very dark skies needed, averted vision is required to see details
Position: 2 - easy, bright star nearby
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
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.


Hi-resolution image: [ reversed sketch | original sketch ]

NGC 2266 (Open cluster)
Right ascension: 6h 43m Declination: 27° 00'
Constellation: Gemini
Date/time: 2014.12.24 00:00 UT
Equipment: 12" f/5 Newtonian
FoV: 12' Magnification and filter(s): 214x
Seeing: 4/10 Transparency: 3/5
SQM: 21.12 m/as2 Temperature: -2°C
Humidity: low Wind: none
Sight: 3 - definite details, interesting look
Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
Position: 2 - easy, bright star nearby
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
Description:

A rich cluster of very faint stars. Nice one, with fuzzy background. Tiny by size and separates well from its neighborhood.


Hi-resolution image: [ reversed sketch | original sketch ]
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