Arnold Schwassmann discovered IC 3576 on a plate taken 8 Nov 1899 with the 6" astrograph at the Konigstuhl Observatory in Heidelberg. His position is accurate.
600/800mm - 24" (5/20/17): very faint, moderately large, very diffuse, very low surface brightness, ~1' diameter. On the SDSS, this galaxy appears to be a blue, barred Magellanic-type irregular.
Notes by Steve Gottlieb