Tol 89, a supergiant HII region with multiple young massive clusters, is close southwest of the core [33" from center at the end of the central bar]. It was visible as a very faint 10" knot, appearing like a smaller version of the core.

John Herschel discovered NGC 5398 = h3552 on 3 Jun 1836 and recorded "pB; pL; R; vgbM; 90"." His position is accurate. In the foreground of ACO S753?

600/800mm - 24" (6/1/13): at 225x (and low elevation) appeared fairly faint, moderately large, ~1.2'x0.9', weak concentration with a slightly brighter 0.4' core. The outer halo has a low surface brightness and fades into the background so the dimensions were difficult to gauge.

Notes by Steve Gottlieb