William Herschel discovered NGC 3600 = H II-709 = h842 on 14 Jan 1788 (sweep 798) and recorded "vF; S; E in the meridian [N-S]." John Herschel wrote on 12 Apr 1830 (sweep 248), "pB; S; lE; vgbM; 20"."

400/500mm - 17.5" (4/1/95): fairly faint, very elongated 3:1 N-S, 1.8'x0.6', small bright core, faint extensions. Two mag 12 stars lie 2.4' and 3.2' NNW of center.

Notes by Steve Gottlieb