John Herschel discovered NGC 1992 = h2873 on 19 Nov 1835 and recorded "eeF; vS; certainly not to be seen except in a superbly clear night, as this is." His position is accurate.
400/500mm - 17.5" (12/3/88): extremely faint, small, very low surface brightness. Forms a pair with NGC 1989 6' NNW in ACO S536.
Notes by Steve Gottlieb