William Denning discovered IC 391 on 7 Nov 1890 with his 10-inch With-Browning reflector from England. He simply noted "F, S, R." and measured a fairly accurate position.

400/500mm - 17.5" (3/1/03): easily swept up at 100x; fairly faint, moderately large, round, fairly even surface brightness. At 220x, embedded in the middle of a scattered group of stars, 1' diameter, nearly uniform surface brightness, possibly slightly elongated ~E-W, 1.0'x0.9'.

Notes by Steve Gottlieb