Albert Marth discovered NGC 3405 = m 206 on 1 Apr 1864 and noted "F, eS, alm stell, close to S*." Marth's position is 1.0 tmin east of UGC 5933. The same offet error was made with NGCC 3399. This is a double system; 0.7' x 0.7' + 0.2' x 0.2', with a separation of 0.35' SW-NE.

400/500mm - 17.5" (4/22/95): fairly faint, fairly small. At first glance appeared elongated 3:2 SW-NE but on closer inspection resolves into a very close pair of small faint galaxies with a 20" separation between centers. The brighter component (NGC 3405) is at the southwest end and is very small and round. The fainter member (MCG +03-28-015) is just barely separated at the northeast side. NGC 3399 lies 4.0' WSW. Forms an perfect equilateral triangle with two mag 13 stars 1.7' SW and 1.7' SSE.

Notes by Steve Gottlieb