William Herschel discovered NGC 4928 = H II-190 = H III-760 = h3453 on 25 Apr 1784 (sweep 208) and recorded "not vF, cL, E, r." He did not measure a position, only noting "it precedes the supposed 39 Vir 3 min in time and is 56' more north." He observed it again on 3 Mar 1786 (sweep 536) and measured an accurate position. He found it again on 23 Mar 1789, assumed it was new and logged H III-760 as "cF, vS, R." His position was 3' too far southeast. JH assigned two GC designations, which Dreyer combined in the NGC.

400/500mm - 17.5" (5/22/93): moderately bright, fairly small, elongated 3:2 SW-NE, 1.0'x0.7', broad mild concentration. On a line with two mag 12-13 stars 1.5' ESE and 3' ESE.

Notes by Steve Gottlieb