M 101 in Ursa Major 23rd April 2020 @ 23:05 UT
The amazing Pinwheel Galaxy in Ursa Major. The arms sweep out an amazing distance from the core.
Image: 15 seconds x 248 frames (3720 seconds total), gain 6579, bin 1x1, Raw 14, black level 99, camera temperature 14.1 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.
A processed image in GIMP to bring out more detail in those sweeping spiral arms.
Astrometry: M 101, 23 million light years distance.
First recorded by Charles Messier in 1781.