Arnold Schwassmann discovered IC 3478 = Sn. 289 on 22 Nov 1900 using a plate taken by Wolf with the 6" astrograph at the Königstuhl Observatory in Heidelberg. Royal Frost also reported it on a plate taken at the Arequipa station on 10 May 1904 and noted "bM, magn. 15 (Sch. 289)." Finally it was also discovered on plates taken with the Crossley reflector in 1898-1900, but not reported until 1908 (Publications of Lick Observatory, Vol VIII) as #465 of 744 new nebulae.

600/800mm - 24" (5/20/17): faint, small, irregular round, diffuse, 0.4' diameter, very faint stellar nucleus. Located 17' SE of M88 and 8.8' N of IC 3476.

Notes by Steve Gottlieb