Lewis Swift discovered IC 506 = Sw. VII-13, along with IC 504 and 505, on 8 Mar 1888 and recorded "eeF; eS; R; ee diff.; 3rd of 3."
600/800mm - 24" (2/8/18): at 375x; fairly faint, small, round, 20" diameter, quasi-stellar nucleus. Member of the IC 504 group (WBL 179) with IC 505 5' NNW and IC 504 12' WSW.
Notes by Steve Gottlieb