NGC 6645

Michael Bakich in his new book “1001 Celestial Wonders to see before you die” said that, “The feature you wont to see lies near the center of the cluster. It’s a circlet of 15 stars whose center is empty.”  I had read that this feature was aperture dependent, so I was surprised to see it clearly in this dim cluster with my 4″ TV102 refractor. This cluster is a pretty faint unresolved gray haze with about 30 dim stars visible. Near the center of the cluster is an oval of 12 faint stars with no visible stars inside this circlet.