John Herschel discovered NGC 5915 = h3600, along with NGC 5916, on 5 Jun 1836 and recorded "B; S; R; glbM; 15". The preceding of 2." His position is accurate.

300/350mm - 13" (6/4/83): fairly faint, small, fairly compact, round, slightly brighter core.

400/500mm - 17.5" (5/30/92): fairly faint, fairly small, elongated 3:2 NW-SE, 1.0'x0.7', brighter along the major axis but halo appears rounder. A mag 15 star is at the south edge 33" from center and a mag 12.5 star is 2.1' NE. Forms a pair with NGC 5916 4.5' SSE.

Notes by Steve Gottlieb