Albert Marth discovered NGC 2365 = m 102 on 10 Nov 1864 with Lassell's 48" and recorded "vF, pS, R, psbM." Édouard Stephan independently discovered this galaxy on 13 Jan 1874 and reported it in list VI-7.

400/500mm - 17.5" (1/19/91): fairly faint, fairly small, oval 3:2 NNW-SSE, bright core. A mag 14 star is just off the SW side 0.7' from center and a mag 12.5 star is 1.3' SW.

600/800mm - 24" (2/14/15): at 260x; moderately bright and large, elongated 2:1 N-S, ~1.2'x0.6', well concentrated with a bright oval core. A mag 14 star is at the southwest edge [48" from center]. Located 32' ENE of mag 3.5 Delta Geminorum.

Forms a close pair with CGCG 117-019 2.6' SSW. The companion is faint, small, round, 18" diameter. Occasionally contains a faint stellar nucleus. A wide 15" double star is 1' SSE. UGC 3827 lies 13' NE and appears faint, small, oval 4:3, 20"x15" [core only seen]. A mag 13.3 star is at the south east edge of the galaxy.

Notes by Steve Gottlieb