A time will come when men will stretch out their eyes. They should see planets like our Earth.
/ Christopher Wren /



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.


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NGC 1501 (Planetary nebula)
Also known as: Herschel H53-4
Right ascension: 4h 8m Declination: 60° 58'
Constellation: Camelopardalis
Date/time: 2015.11.12 23:40 UT
Equipment: 12" f/5 Newtonian
FoV: 16' Magnification and filter(s): 214x + UHC, O-III filter(s)
Seeing: 4/10 Transparency: 4/5
SQM: 21.14 m/as2 Temperature: 6°C
Humidity: low Wind: none
Sight: 4 - lots of details, very interesting, unique look
Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
Position: 2 - easy, bright star nearby
Location: Talpa Minor Observatory
Observer: Ferenc Lovró
Description:

I was very surprised when I looked into the 21mm (71x) eyepiece I use for searching objects, because I expected a tiny fuzzy stellar sight: instead a small, round, well-defined spot greeted me. Increased my magnification to 250x, however - most probably because of the below average seeing - the planetary nebula was much better looking when I stepped back from my 6mm TMB Planetary II to my 7mm of the same type, providing a modest 214x magnification. This is a very easy target even without filters, however I found that it appears much brighter compared to the sky background with a wide transmission UHC filter. An O-III was also fine, but somehow the UHC view was a bit neater for me. It resembles the M57 Ring Nebula, except that it is a bit fainter, smaller, and the central part of the muffin shape is not as dark, but closer to the outer regions in surface brightness. Can be found relatively easily by following the path of Kemble's Cascade, as it sits near one of its end, close to the nice open cluster NGC 1502.


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