William Herschel discovered NGC 4586 = H I-125 = h1371 on 2 Feb 1786 (sweep 521) and recorded "pB, pL, E." His position at the north edge of UGC 7804. JH made two observations and logged "pB; pmE; psbM." on sweep 141.

400/500mm - 17.5" (2/28/87): moderately bright, moderately large, elongated 5:2 NW-SE. Contains a very bright core. Located 10' E of mag 6.9 SAO 119502. NGC 4576 lies 15' WNW.

Notes by Steve Gottlieb