Francis Leavenworth discovered NGC 3634 = LM 2-433, along with NGC 3635, on 24 Jan 1887. His (single) position is very close to the double system MCG -01-29-008 and -009.

600/800mm - 24" (3/9/13): faint, extremely small, round, 8"-10" diameter. Situated at the west edge of brighter NGC 3635, appearing as a small knot. The surface brightness is relatively high (similar to the nucleus of NGC 3635), so this galaxy was fairly easy to see at 375x. A mag 13.5 star is ~30" W.

Notes by Steve Gottlieb