Lewis Swift discovered NGC 6456 = Sw. V-76, along with NGC 6471, 6472 and 6477, on 25 Sep 1886 and recorded "eeeF; eS; R; ee diff; between 2 stars; 1st of 6." His position is 11 sec of RA west and 1' north of PGC 60729, the brightest of several faint galaxies near his position. MCG misidentifies CGCG 321-032 = PGC 60721 as NGC 6456.

400/500mm - 17.5" (6/11/88): very faint, very small, round, weak concentration. First of 7 and in a trio with NGC 6463 6.0' E and PGC 2701716 6' SE.

600/800mm - 24" (8/23/14): at 375x appeared fairly faint, fairly small, irregularly round, 20"-24" diameter, slightly brighter middle. A mag 16.6 star is 0.4' N of center.

Notes by Steve Gottlieb