John Herschel discovered NGC 4992 = h1541 on 4 Apr 1831 and recorded "vF; S; lE; north of two small stars." His position is accurate.
400/500mm - 18" (5/28/06): fairly faint, small, elongated 5:3 ~N-S, 0.7'x0.4', very weak concentration. Located 51' W of mag 5.8 HD 114780.
Notes by Steve Gottlieb