William Herschel discovered NGC 4670 = H III-328 = h1422, along with NGC 4673, on 6 Apr 1785 (sweep 393) and noted "F, S." JH made four observations, calling this galaxy "B", "pB" and "F".

400/500mm - 17.5" (3/20/93): fairly faint, fairly small, elongated 3:2 E-W, bright core, almost stellar nucleus. Located 4.5' W of mag 9 SAO 82478. Forms a pair with NGC 4673 5.6' SE.

Notes by Steve Gottlieb