M 81 / NGC 3031

M 81 / NGC 3031

M 81 (NGC 3031; magnitude 7.0) is a spiral galaxy in Ursa Major. The ridges on the right side of the picture are artefacts of the image processing and not part of the galaxy. I couldn't eliminate them without also washing out the spiral arms of the galaxy.

Image taken 3 Mar 2020. A stack of 108 30-second exposures.