Arnold Schwassmann discovered IC 3355 = Sn. 251 on 17 Nov 1900 using a plate taken with the 6" astrograph at the Königstuhl Observatory in Heidelberg. Royal Frost also reported it on two plates taken at the Arequipa station in May 1904. He noted "streak; 1.0' by 0.2' at 170° (Sch 251)".

600/800mm - 24" (5/29/14): extremely faint, small, round?, ~20" diameter, very low surface brightness. Situated 16.6' NE of M86.

Notes by Steve Gottlieb