NGC-3938 is a large, face-on Type Sc spiral galaxy located in the constellation of Ursa Major, about 5 degrees south of the star Chi Ursae Majoris, below the bowl of the Big Dipper. It lies approximately 43 million light years from Earth and is over 67,000 light years in diameter. It was discovered by Sir William Herschel in 1788. Also visible in this image is the type 1a supernova 2017en, which was discovered on May 26, 2017.
This image, acquired on June 19, 2017, is a 1 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, StarShrink, Carboni's Astro Tools and NoiseWare.