Lewis Swift discovered NGC 3306 = Sw. III-57 on 27 Apr 1886 and recorded "F; S; R; sf of [NGC 3299]." His position is 1.5' too far south. Rudolph Spitaler measured an accurate micrometric position in 1891 at Vienna.

400/500mm - 17.5" (3/1/03): fairly faint, fairly small, elongated 5:2 NW-SE, 0.8'x0.3, weak concentration to a slightly brighter core. A mag 11 star lies 1.9' NE. NGC 3299, a very low surface brightness galaxy, lies 12' WNW.

600/800mm - 24" (4/20/14): fairly faint to moderately bright, fairly small, elongated 2:1 NW-SE, 0.8'x0.4', relatively large brighter core. Brightest in a trio (KTG 30) with CGCG 065-069 7.2' SSE and NGC 3299 11.8' WNW.

Notes by Steve Gottlieb