John Herschel discovered NGC 3936 = h3367 on 24 Mar 1835 and recorded "vF; vmE; 2' l; 15" br; pos of extension = 59.3°." His position and description match ESO 504-020. Based on photos taken at the Helwan Observatory in 1919-20, it was described as "F, 3' x 0.25', E 75°; spiral seen edge-wise; no nucleus."

400/500mm - 17.5" (4/6/91): fairly faint, moderately large, edge-on 5:1 SW-NE, 3.0'x0.6', fairly even surface brightness. A mag 10.5 star is 4.8' N.

Notes by Steve Gottlieb