There are 10^11 stars in the galaxy. That used to be a huge number. But it's only a hundred billion. It's less than the national deficit! We used to call them astronomical numbers. Now we should call them economical numbers.
/ Richard Feynman /



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 elérhető, 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 7209 (Open cluster)
Right ascension: 22h 5m Declination: 46° 30'
Constellation: Lacerta
Date/time: 2008.09.05 00:30 UT
Equipment: 12" f/5 Newtonian
FoV: 43' Magnification and filter(s): 45x
Seeing: 5/10 Transparency: 4/5
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
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.
Hi-resolution image: [ reversed sketch | original sketch ]

NGC 7250 + SN 2013dy (Galaxy)
Right ascension: 22h 19m Declination: 40° 38'
Constellation: Lacerta
Date/time: 2013.07.21 01:00 UT
Equipment: 12" f/5 Newtonian
FoV: ' Magnification and filter(s): 300x
Seeing: 7/10 Transparency: 2/5
SQM: 20.01 m/as2 Temperature: 11°C
Humidity: dry Wind: none
Sight: 1 - nothing spectacular
Difficulty: 5 - almost invisible, total dark adaptation, very dark skies and averted vision is a must to see the object
Position: 4 - hard, complex starhopping needed
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
Description:

The host galaxy of the supernova SN 2013dy, NGC 7250 appears as a very faint patch of light in the FoV. I try to compensate for the bright sky background by increasing the magnification, caused by the rising full Moon and the dust in the air caused by harvesters. Yesterday my observation was negative, but today I succeeded, although it was still a very difficult task. I estimate the brightness of the supernova to nearly 12.3m visually.
Hi-resolution image: [ reversed sketch | original sketch ]
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All text and images are ©opyright of Ferenc Lovró. All rights reserved worldwide.

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