Stephane Javelle discovered IC 3900 = J. 3-1228 on 25 Jun 1903 with the 30-inch refractor at the Nice Observatory.

400/500mm - 17.5" (5/14/94): fairly faint, very small, round, high surface brightness, weakly concentrated, occasional stellar nucleus. Collinear with a mag 13 star and a mag 10.5 star 1.3' S and 3.1' S of center, respectively. Easily picked up 14.5' SW of NGC 4798 in AGC 1656.

Notes by Steve Gottlieb