Édouard Stephan discovered NGC 5975 = St XII-75 on 19 Jun 1882. His position matches UGC 9963. This galaxy is apparently superimposed on AGC 2107.

400/500mm - 17.5" (4/7/89): faint, small, very elongated N-S, poorly concentrated.

600/800mm - 24" (7/21/12): fairly faint, fairly small, very elongated N-S, ~40"x16", slightly brighter along the major axis but no well defined core. Located on the south side of AGC 2107 (in the foreground) and 8' NW of mag 8.4 HD 139952. CGCG 136-050, located 3.7' NE, appeared faint to fairly faint, small, slightly elongated NNW-SSE, 20"x15", broad weak concentration. A mag 11 star is 1.3' SSE.

Notes by Steve Gottlieb