This globular is the second closest to us after M4 at 7,200lyrs and is one of 20% of globs showing core collapse. Central density was worth a closer look with the sensitive mintron at 4300mm fl, unfortunately bad seeing hindered closer look.
ATK-16HR, RGB-10x3min each.
Mintron, L=17min RGB=6min each in 2.56 sec subs.