Albert Marth discovered NGC 2376 = m 104 on 10 Nov 1864 with Lassell's 48" and recorded "eF, vS." His position matches CGCG 117-039 = PGC 21015.
400/500mm - 17.5" (2/8/91): very faint, very small, round. A mag 15.5 star is attached at the west end.
Notes by Steve Gottlieb