Auguste Voigt discovered IC 3155 = Big. 290 in Jun 1865 with the 31-inch silver-on-glass reflector at Marseille. The discovery wasn't published or forwarded to Dreyer, so IC 3155 didn't receive a NGC designation. Wolfgang Steinicke states that Voigt's discoveries were only listed in his observation log, which was published in 1987.

Hermann Kobold independently discovered this galaxy on 5 Apr 1894 (published in 1907), as well as Bigourdan on 31 Mar 1902. Bigourdan was credited with the discovery in the IC.

400/500mm - 17.5" (3/24/90): very faint, very small, slightly elongated SW-NE, even surface brightness. Located 2.2' SSW of mag 7.7 SAO 119333. Forms the fainter member of a pair with NGC 4269 1.1' NE.

600/800mm - 24" (4/28/14): fairly faint, fairly small, elongated 5:3 SW-NE, very weak concentration, 30"x18". Slightly larger than NGC 4269 (though lower surface brightness) just 1.2' NE. Mag 7.7 HD 107238 lies 2.2' NNE.

Notes by Steve Gottlieb