John Herschel discovered NGC 5150 = h3507 on 5 May 1834 and recorded "F; S; R; pslbM; 15"." Three nights later he logged "pF; S; R; bM; has a * 2' following; pos by diag = 67°."

300/350mm - 13.1" (5/26/84): fairly faint, small, bright core. Located 2' WSW of mag 9.1 SAO 181670. In a trio with the NGC 5152/NGC 5153 interacting pair 5' SE.

Notes by Steve Gottlieb