Albert Marth discovered NGC 6076 = m 303, along with NGC 6077, on 24 Jun 1864 and noted "vF, S, E." His position is accurate.

400/500mm - 17.5" (7/15/93): very faint, very small, round. Forms a pair with NGC 6077 3.5' N. Located 2' SE of mag 7.3 SAO 84233. A mag 14 star is 45" NE. This double system was not resolved.

600/800mm - 24" (6/14/15): at 225x; this double system appeared faint to fairly faint, elongated 2:1 WSW-ENE, 24"x12". At 375x, the elongated glow occasionally resolved into two extremely small nuclei within a common halo. The fainter eastern component (NGC 6076 NED2) is listed in HyperLeda as PGC 200331. Located just 1.7' SE of mag 7.5 HD 145676. Slightly brighter NGC 6077 lies 3' N.

Notes by Steve Gottlieb