M-2 (NGC-7089) is a globular star cluster located in the constellation of Aquarius, 5 degrees north of the star Beta Aquarii. It was discovered by Maraldi in 1746 and rediscovered by Charles Messier in 1760 and added to his catalog as number 2. It is one of the largest globular clusters in our Milky Way galaxy, but is also very distant, being over 55,000 light years from Earth. It is 170 light years in diameter. It contains over 150,000 stars.
This image, acquired on August 23, 2014, is a 40 minute integration of 4 minute exposures through the Celestron C-11 at f2, using the HyperStar III imaging system and the Starlight Express SXVR-H694C color CCD camera operating at -10 degrees below ambient temperature and binned 1 X 1. Guided, captured and combined using Maxim DL5 Pro. Post processed using PhotoShop CS2, Gradient XTerminator, StarShrink, Carboni's Astro Tools, and NoiseWare.