William Herschel discovered NGC 4200 = H II-164 = h1138 on 17 Apr 1784 (sweep 199) and noted "pS, vmE." On 6 Apr 1831, JH logged "pB; R; pslbM; 40"."
400/500mm - 17.5" (1/23/88): fairly faint, moderately large, elongated 3:2 E-W, brighter core.
Notes by Steve Gottlieb