R.J. Mitchell (GC 464) discovered NGC 770 on 3 Nov 1855 while observing NGC 772. He noted, "has companion neb. 5' or 6' south." Dreyer later measured an accurate offset. Heinrich d'Arrest (GC 461) independently found NGC 770 in 1861 and it was listed twice in the GC. Both entries were combined in the NGC with an accurate position.

300/350mm - 13.1" faint, very small, round, small bright core. Located 3.5' SSW of NGC 772.

400/500mm - 18" (12/3/05): fairly faint, fairly small, round, 30" diameter, increases to a small bright core. This is a companion to NGC 772 and may be the cause of its bright, disturbed spiral arm.

900/1200mm - 48" (11/1/13): bright, fairly small, slightly elongated SSW-NNE, ~40"x32", very high surface brightness. Forms a double system 3.5' SSW of NGC 772, a showpiece spiral.

Notes by Steve Gottlieb