Max Wolf discovered IC 3559 = W. IV-226 on a Heidelberg plate taken 23 Mar 1903. He reported "vF, vS, R, bM." MCG, PGC and HyperLeda omit the NGC label, although the identification is certain.

400/500mm - 18" (5/12/07): this marginal object was only glimpsed knowing the exact location in the NGC 4556 group. Located 2.4' E of NGC 4558 and 1.7' NE of IC 3556 in a tight group of a half dozen galaxies.

Notes by Steve Gottlieb