William Herschel discovered NGC 3669 = H II-829 = h883 on 18 Mar 1790 (sweep 951) and noted "vF, E, easily resolvable." His position is accurate. JH made a single observation and logged "vF; mE; vlbM; 60" length."

400/500mm - 17.5" (3/19/88): fairly faint, moderately large, edge-on 4:1 NNW-SSE, even surface brightness.

Notes by Steve Gottlieb