William Herschel discovered NGC 4519 = H II-158 on 15 Apr 1784 (sweep 194) and recorded, "F, pL, almost R, r." His position (CH's reduction) is 3' northeast of UGC 7709. This galaxy was not observed by JH, but d'Arrest measured an accurate position on 2 nights.

400/500mm - 17.5" (4/18/87): fairly bright, moderately large, brighter core, slightly elongated. A knot is superimposed on the SW end.

600/800mm - 24" (6/4/16): at 322x; bright, large, slightly elongated 5:4 SW-NE, at least 1.5'x1.2'. Contains a relatively large brighter core. The halo is noticeably mottled with an uneven surface brightness (probably due to HII knots in the arms).

Forms a pair with NGC 4519A 2.6' NW. This companion appeared very faint (V ~15.4), small, elongated 2:1 SW-NE, low even surface brightness. A mag 14.3 star is 35" SW.

Notes by Steve Gottlieb