M4 Globular Cluster
Measuring about 75 light years across, M4 is one of the more loosely structured globular clusters. The exact number of stars it contains is unknown but believed to be in the tens of thousands. Along with NGC 6397 it is the closest globular cluster to us at only 7,000 light years away. North is at the top.

Scope/Mount: AstroTech AT8RC 8" F8 Ritchey-Chretien with ATFF2 Field Flattener, Celestron CI-700 Mount
Camera: Orion StarShoot Pro V2 one-shot color
Guiding: QHY5L-IIM through Orion Deluxe OAG, PHD guiding software
Exposure: (6) 5 min
Software: Nebulosity, PhotoShop CS2
Comment: 06-13-15, Tierra del Sol, CA. Below average seeing, some clouds.