Albert Marth discovered NGC 6900 = m 408 on 1 Oct 1863 and noted "vF, S, R."
400/500mm - 17.5" (7/16/88): faint, small, slightly elongated 4:3 WNW-ESE, very diffuse, even surface brightness.
Notes by Steve Gottlieb
Albert Marth discovered NGC 6900 = m 408 on 1 Oct 1863 and noted "vF, S, R."
400/500mm - 17.5" (7/16/88): faint, small, slightly elongated 4:3 WNW-ESE, very diffuse, even surface brightness.
Notes by Steve Gottlieb