John Herschel discovered NGC 4620 = h1387 on 29 Mar 1830 and logged "vF; S; R; vgbM; 15"." His position matches UGC 7859 = PGC 42619.

400/500mm - 18" (4/10/04): moderately bright, round, 1.0' diameter, weak concentration to the center with a small slightly brighter core. Forms the NW vertex of an obtuse triangle with two mag 11 stars 4.7' ENE and 5.3' SSW.

18" (3/13/04): fairly faint, moderately large, round, 1.0' diameter, weak concentration.

Notes by Steve Gottlieb