Albert Marth discovered NGC 1431 = m 91 on 6 Sep 1864 with William Lassell's 48" on Malta and recorded "eF, pL, iR." His position is 2' N of UGC 2845 = PGC 13732.

400/500mm - 17.5" (1/12/02): very faint, small, round, 0.5' diameter, low surface brightness, requires averted vision. Located 14' NW of mag 6.7 SAO 111393. Four mag 9.5-11 stars are in the 220x field including a mag 11 star 4' S.

Notes by Steve Gottlieb