John Herschel discovered NGC 566 = h125 on 22 Nov 1827 and noted "vF; S; R". His position matches UGC 1058 = PGC 5545.
400/500mm - 17.5" (12/23/89): very faint, fairly small, elongated N-S, even surface brightness. NGC 571 lies 15' NE.
Notes by Steve Gottlieb