William Herschel discovered NGC 6154 = H III-680 on 15 May 1787 (sweep 737) and recorded "eF, S, easily resolvable, near some small stars." Caroline Herschel's reduction was 10 sec of RA east and 2' north of UGC 10382. He observed this galaxy again on 13 Apr 1788 (sweep 832) and noted "vF, S, R, lbM." Bigourdan measured an accurate RA (repeated in the IC 2 Notes) on 19 Jul 1884.

400/500mm - 17.5" (7/1/89): fairly faint, fairly small. Sharp concentration with an elongated NW-SE core and a faint rounder halo with no distinct edges.

600/800mm - 24" (6/30/19): at 282x and 375x; moderately bright, fairly small, round, ~50" diameter, strong concentration with a very small bright nucleus. Two mag 12.3/14.4 stars close NW are nearly collinear with the galaxy.

Notes by Steve Gottlieb