William Herschel discovered NGC 3594 = H III-770 on 14 Apr 1789 (sweep 920) and noted "vF, vS, stellar neb." His position is 0.6 tmin of RA west and 2.5' north of UGC 6286. But Harold Corwin notes that his position is also 13' following CGCG 268-006, which has a higher surface brightness and is a possible identification.

400/500mm - 17.5" (3/12/88): faint, very small, round, bright core. A mag 11 star is 2.7' ENE.

Notes by Steve Gottlieb