M5, globular cluster in Serpens.
About 24,500 light-years distant and 165 light-years in diameter it is one of the largest known globular clusters.
It's estimated to contain 100,000 to 500,000 stars.
Taken at Cherry Springs State Park June 30th 2016
Celestron C8 @ F7.5 with Starizona reducer\corrector 1500mm EFL
QSI583wsg, Baader filters
LRGB
Luminance 16x5 minutes binned 2x2
RGB 10 each at 2 minutes binned 2x2
Total exposure 140 minutes