Albert Marth discovered NGC 3340 = m 199 on 30 Jan 1865 and noted "F, S, R." His position matches UGC 5827. NGC 3339 is a faint star 2.1' west-northwest. UGC and CGCG label this galaxy as NGC 3339 = NGC 3340, although only NGC 3340 should apply.

400/500mm - 17.5" (4/29/00): faint, fairly small, round, 0.8' diameter, very weak even concentration to a slightly brighter core. The halo fades into the background. Located 12' SW of uneven double ∑1464 = 8.2/10.9 at 5". This galaxy is incorrectly identified as NGC 3339 in the RNGC.

Notes by Steve Gottlieb