NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC3930
Basic Information
Location and Magnitude
Right Ascension: 11:51:45.7
Declination: +38:0:52
Constellation: UMA
Visual Magnitude: 12.4
Historic Information
Discoverer: Herschel W.
Year of discovery: 1787
Discovery aperture: 18.7
Observational
Summary description: eF, cL, iF, glbM, * 7 f
Sub-type: SBc
Steve's Notes
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NGC 3930
18" (4/5/03): very faint, moderately large, round. Appears as a very diffuse ill-defined glow with just a weak concentration. It was not initially noticed initially in the field. Located 2.5' E of a mag 13 star, the southernmost of three collinear mag 13/13.5 stars. John Herschel mentioned a 7th magnitude star which followed due east by 3'. This is Groombridge 1830, which has the third fastest known proper motion (7.04"/yr) and this star is now roughly 23' SE!