Francis Leavenworth discovered NGC 3635 = LM 2-434, along with NGC 3634, on 24 Jan 1887. His (single) position is very close to the double system MCG -01-29-008 and -009.

400/500mm - 17.5" (4/14/01): faint, small, elongated 3:2 NNW-SSE, 0.7'x0.4', weak concentration. NGC 3634 was not seen. A mag 14.5 star lies 1' W.

600/800mm - 24" (3/9/13): fairly faint, fairly small, elongated 3:2 ~N-S, 30"x20", very small brighter nucleus. NGC 3634, a very compact interacting companion, is attached on the west edge. A mag 13.5 star lies 0.9' W.

Notes by Steve Gottlieb