M 40 in Ursa Major 22nd April 2020 @ 00:26 UT
An unusual Messier object, a double star. Messier was looking for a nebula and added this double star to his catalogue.
Image: 15 seconds x 45 frames (675 seconds total), gain 6579, bin 1x1, Raw 14, black level 99, camera temperature 14.5 deg C, 1 dark. Stacked in SharpCap Pro 3.2.6248.0. The image was stacked and adjusted in SharpCap. The image was scaled down and cropped in GIMP.
Equipment: Celestron CPC-800 at F5.9, Alt-Az mount, Altair Astro Hypercam 294C Pro Cooled (fan), Celestron Focuser, CPWI controlled remotely via Microsoft RDP and ASCOM.
Astrometry: M 40, 510 light years distance. Double star, magnitude 9.
Recorded by Charles Messier while searching for a nebula.