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Sab's March Challenges:
IC 2501
This is a fairly bright planetary in Carina, shining at Mag 11.3. So, what's the catch? It is extremely tiny, at just 2" in diameter. Being high surface brightness, it is bright enough to see even in the smallest apertures, but will appear completely starlike. OIII filters will help to differentiate it from the rich star field. Larger scopes, excellent seeing and extreme magnification are required to see something vagually resembling a disk.
Vela SNR
Get out of the city to see this one. Should be visible in a 4 or 5" rich field scope at low power with an OIII or UHC.
Abell 1060
A dense collection of faint galaxies in Crater. The three brightest members, NGC 3309, 3308, 3311 are elliptical galaxies with V magnitudes of 11-12, so should be visible in a 4" class instrument under good skies. Several smaller galaxies are in the same field, but are very faint with magnitudes of 14 and below.
Last edited by pgc hunter; 12-03-2010 at 08:23 PM.
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