ABELL 39 is a large, dim planetary nebula located in the constellation of Hercules. It is located about 5 degrees SW of Zeta Herculis. ABELL 39 lies 6800 light years from Earth and is 2.5 light years in diameter. Its central star is a 15.6 magnitude type O sub-dwarf star.
This image, acquired on July 20, 2017, is a 2 hour integration of 6 minute exposures through the Celestron C-11 at f/2, 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, Star Shrink, Carboni's Astro Tools, and NoiseWare.