Lewis Swift discovered IC 1610 = Sw. XI-10 on 13 Dec 1895 and recorded "pF; pS; R; 9m * nearly in contact np [north-preceding]". His position is 3' SSW of PGC 3681and his description clinches the identification.

600/800mm - 24" (10/1/16): at 375x; fairly faint to moderately bright, fairly small, round, 25" diameter, small bright nucleus, high surface brightness. A mag 12.5 star is just off the north edge, only 30" from center.

Notes by Steve Gottlieb