Édouard Stephan discovered NGC 5504 = St XI-23 on 7 Jun 1880. His position is accurate. UGC and CGCG misidentify UGC 9086 as IC 4383.
400/500mm - 17.5" (5/11/02): fairly faint, moderately large, round, 1.2' diameter, fairly low surface brightness. Located 11' WSW of mag 8.3 SAO 100916.
Notes by Steve Gottlieb