Lewis Swift discovered NGC 6423 = Sw. II-58, along with NGC 6422 = Sw. II-57, on 1 Aug 1885, and recorded "eeF; vS; R; * nr east; v diff." His position is 12 seconds west and 0.8' south of CGCG 321-027 = PGC 60576. Bigourdan's position, measured on 7 Sep 1888, matches PGC 60756. There is no star "nr east", though a mag 12 star is 1.5' north. MCG does not label this galaxy as NGC 6423. See notes for NGC 6419.

400/500mm - 17.5" (6/11/88): very faint, very small, round, weak concentration. Forms a pair with NGC 6419 4.5' W. Member of the NGC 6422 group (WBL 644)

Notes by Steve Gottlieb