Albert Marth discovered NGC 505 = m 46 on 1 Oct 1864 with Lassell's 48" on Malta and logged "vF, vS, stellar". His position is accurate.

300/350mm - 13.1" (8/24/84): extremely faint, slightly elongated ~E-W? Located 7' WNW of NGC 509 in the NGC 524 group.

400/500mm - 17.5" (10/17/87): very faint, extremely small, round. NGC 509 lies 7' ESE.

Notes by Steve Gottlieb