Heinrich d'Arrest discovered NGC 3759 on 19 Aug 1866 with the 11" refractor at Copenhagen. His position, measured twice, matches UGC 6581 and he accurately places a mag 11 star 2' distant (due south).

400/500mm - 17.5" (3/19/88): faint, very small, round, weak concentration. Located 2.1' N of a mag 11 star and 16' E of mag 5.6 SAO 28064. Forms a pair with IC 2943 2.2' NW. NGC 3759A = UGC 6582 lies 20' N. Member of AGC 1318.

Notes by Steve Gottlieb