Albert Marth discovered NGC 7428 = m 510, along with NGC 7434, on 27 Jul 1864 and noted "F, vS, R, bM." His position is accurate.

300/350mm - 13.1" (11/29/86): fairly faint, fairly small, almost round, small bright core.

400/500mm - 17.5" (7/22/87): fairly faint, fairly small, slightly elongated SW-NE, small bright core. NGC 7434 lies 17.5' ESE.

Notes by Steve Gottlieb