William Herschel discovered NGC 3451 = H II-364 = h789 on 11 Apr 1785 (sweep 396) and noted "pF, pL, lE, brightest towards the sf part." John Herschel made 4 observations logging this galaxy as both "eF" and "pB".

400/500mm - 17.5" (2/8/91): fairly faint, fairly small, elongated 2:1 SW-NE, weakly concentrated but no core. A mag 11.5 star is 4.2' NW of center.

Notes by Steve Gottlieb