William Herschel discovered NGC 4506 = H II-631 = h1316 on 14 Jan 1787 (sweep 691) and noted "F". His position is 2.5' south and 8 sec of time west of UGC 7682. JH recorded "vF; pmE in parallel; gbM; a * 9m 8 sec following." His position and description matches this galaxy.

400/500mm - 17.5" (4/25/87): faint, small, slightly elongated E-W, diffuse, very weakly concentrated core. A mag 11 star is 2.1' W. Located 34' E of NGC 4473 near the Virgo border.

Notes by Steve Gottlieb