NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC4921
Basic Information
Location and Magnitude
Right Ascension: 13:1:26.3
Declination: +27:53:8
Constellation: COM
Visual Magnitude: 12.2
Historic Information
Discoverer: Herschel W.
Year of discovery: 1785
Discovery aperture: 18.7
Observational
Summary description: F, pL, 3rd of 4
Sub-type: SBab
Steve's Notes
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NGC 4921
18" (4/20/12): fairly faint, moderately large, irregularly round, ~1.5' diameter, sharply concentrated with a fairly faint, slightly elongated core, ~24"x20", surrounded by a very low surface brightness unconcentrated halo. NGC 4923 lies 2.7' SSE. This is the largest spiral (face-on) in the Coma cluster.
17.5" (4/21/90): fairly faint, fairly small, bright core, large low surface brightness halo surrounded core. This is one of the brighter members of AGC 1656 but it appears fainter than the integrated V magnitude suggests. Nearby are NGC 4923 2.7' SSE and NGC 4919 5.1' SSW.
13" (5/14/83): fairly faint, fairly small, round, 3rd of 3 in AGC 1656.