William Herschel discovered NGC 4158 = H II-405 = h1115 on 27 Apr 1785 (sweep 403) and noted "F, S, lE. Preceding a pB star." His position is 2' south of UGC 7182. JH noted "vF; has a * nf.", but the star is southeast.

400/500mm - 17.5" (5/14/88): moderately bright, fairly small, broad concentration, slightly elongated ~E-W. A mag 11 star is 1.7' SE of center. Located 25' SW of 5 Comae Berenices (V = 5.6).

Notes by Steve Gottlieb