M-107 (NGC-6171) is a loosely structured (Sawyer class X) globular star cluster located in the constellation of Ophiuchus, just 2.5 degrees SE of the star Zeta Ophiuchi. It lies 20,000 light years from Earth and is 60 light years in diameter. It was discovered by Pierre Mechain in 1782.
This image was acquired on August 1, 2022, and is a 30 minute integration of 60 second exposures through the Celestron C-11 at f/2, using the Starizona HyperStar III imaging system and the ZWO ASI 2600MC Pro CMOS camera, operating at -15 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, HLVG, and NoiseWare.