Albert Marth discovered NGC 5231 = m 264 on 30 Apr 1864 and noted "F, S, bM." His position is 1' south of UGC 8574.
400/500mm - 17.5" (6/8/02): fairly faint, fairly small, slightly elongated, 0.7'x0.6', broad concentration with a slightly brighter core and an occasional stellar nucleus.
Notes by Steve Gottlieb