Location of Photo:
Pommier Observatory, Portland, OR, USA
Date/Time of photo:
2017-06-21 through 2017-06-23
Celestron Compustar C14 with Starizona LF reducer/corrector (f/7,5). SBIG STL 11000 CCD camera with Baader Planetarium LRGB filters. SBIG AO-L Adaptive Optics @ 8Hz. Exposures: L:R:G:B=100:60:60:50 minutes=4 hours 3 minutes total exposure.
M12 is a globular cluster in the constellation Ophiuchus that lies 15,700 light-years from Earth. It is a Shapley-Sawyer Class IX globular, which means that the core is not very dense and fairly easy to resolve. This image shows several ropey, dark dust lanes along the periphery of the cluster.