Lewis Swift discovered IC 758 = Sw. VII-18 on 17 Apr 1888 and reported "eeF; pS; R; bet. 2 distant st., one a coarse D[ouble]; ee diff." The "coarse D[ouble star]" is ~5' N. CGCG didn't label CGCG 315-009 as IC 758. IC 758 is called IC 757 in the RC1.

600/800mm - 24" (5/20/20): at 225x and 375x; fairly faint, moderately to fairly large, round, 1.2' diameter?, low surface brightness, slightly brighter core that occasionally appears as a bar oriented SW-NE. Located 7' E of a mag 9.4 star.

24" (6/3/19): at 200x; fairly faint, moderately large, over 1' diameter, brighter elongated core, subtle structure in the halo with slightly brighter sections or arcs. Located 7' E of mag 9.4 SAO 15695 and 28' SSW of mag 6.1 HD 105043. Member of a group (LGG 266) with brightest members NGC 4036 and NGC 4041.

Notes by Steve Gottlieb