Albert Marth discovered NGC 6593 = m 373, St VII on 10 Jun 1864 and noted "vF, vS." His position was 1.8' south of CGCG 142-030 = PGC 61617. Stephan independently found this galaxy on 23 Jun 1876 and reported it in list VII-20 as "excessively small and faint, round, slightly brighter middle." His micrometric position is accurate to within 1 second of RA.

400/500mm - 17.5" (7/16/88): very faint, very small, round, weak concentration, faint stellar nucleus. A mag 14 star is 30" N.

Notes by Steve Gottlieb