William Herschel discovered NGC 3728 = H II-351 = h912 on 10 Apr 1785 (sweep 394) and noted "F, S." CH's reduction is 3.8' northwest of UGC 6536. JH recorded "F; S; R; bM" and measured a fairly accurate position.

400/500mm - 17.5" (5/4/02): fairly faint, fairly small. Contains a bright core and stellar nucleus surrounded by faint extensions SSW-NNE, 1.0'x0.6'. A nice mag 9/10 pair at 12" lies 11' SW.

Notes by Steve Gottlieb