Before a war military science seems a real science, like astronomy; but after a war it seems more like astrology.
/ Rebecca West /



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 4485 + NGC 4490 (Galaxy)
Also known as: Arp 269, Cocoon Galaxy
Right ascension: 12h 31m Declination: 41° 37'
Constellation: Canes Venatici
Date/time: 2014.05.23 21:40 UT
Equipment: 12" f/5 Newtonian
FoV: 32' Magnification and filter(s): 100x
Seeing: 7/10 Transparency: 3/5
SQM: 21.18 m/as2 Temperature: 15°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: Nádasdladány, Hungary
Observer: Ferenc Lovró
Description:

A very spectacular pair of galaxies, also listed in Halton Arp's Atlas of Peculiar Galaxies with number 269. NGC 4490 (the larger galaxy) displays details instantly, and by increasing the power two spiral arms become apparent, departing the round central area to the East and West. The Southern side of the galaxy looks more round while the Northern looks more flat. It's minor companion, the NGC 4485 is round, however it shows a slightly brighter Northern side.

Like always, I did not study this object before my observation, so I was very happy to see how much resemblance my sketch has with the astrophotos I've seen later.


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