Telescopes are in some ways like time machines. They reveal galaxies so far away that their light has taken billions of years to reach us. We in astronomy have an advantage in studying the universe, in that we can actually see the past.
/ Sir Martin Rees /



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:



Humason 1-1 (Planetary nebula)
Also known as: Hu 1-1
Right ascension: 29h 09m Declination: 56° 03'
Constellation: Cassiopeia
Date/time: 2015.12.01 19:45 UT
Equipment: 12" f/5 Newtonian
FoV: 10' Magnification and filter(s): 375x
Seeing: 7/10 Transparency: 4/5
SQM: 21.12 m/as2 Temperature: 6°C
Humidity: low Wind: breeze
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: 3 - moderate, some starhopping needed
Location: Talpa Minor Observatory
Observer: Ferenc Lovró
Description:

Bright but very tiny, therefore really difficult object: even at 250x it looks completely stellar. I looked for about 45 minutes at a wrong place nearby thanks to some really inaccurate sketches I used to find this planetary nebula. Turns out, some fellow sketchers did not really see this object, yet confidently drawn a similar fuzzy in a field that is nearby, even resembles the real field a bit, but they were wrong. So I've just learned that it's not only astrophotographs a visual observer shouldn't trust, but one must be precautious with sketches too. Higher magnification may be better, but I couldn't go any higher because of my rather poor condition Dobsonian mount. I've tried O-III, UHC-S and UHC filters, but neither enhanced the view worth mentioning.


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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