Édouard Stephan discovered NGC 3785 = St XI-13, along with NGC 3781 and 3784, on 28 Apr 1881. His position matches UGC 6620.

400/500mm - 17.5" (4/15/93): faint, fairly small, elongated 2:1 SW-NE, small bright core, very faint extensions. Located 1.5' E of a mag 10.5 star. This galaxy is the slightly brighter of a close pair with NGC 3784 just 0.8' NW. NGC 3781 lies 7' NW.

Notes by Steve Gottlieb