Albert Marth discovered NGC 5733 = m 283 on 12 Apr 1864 and noted "vF, S, mE". His position is accurate.
400/500mm - 17.5" (4/13/91): very faint, small, elongated 2:1 SW-NE. Forms the vertex of an isosceles triangle with two mag 13 stars 1.7' WNW and 1.6' ENE of center.
Notes by Steve Gottlieb