The Whirlpool, M51, at about 10.8x6.6 arc min in side is not one of the larger Messier galaxies. It's a small target for a short focal length telescope. To see how much detail I had in my data, I reprocessed it upscaled by 200% using separate workflows for the stars and nebulosity. Aggressively processing for star reduction and noise reduction and sharpening of the galaxy. I stopped imaging on Saturday, May 1, about 2 AM when the sky clouded over. I found 26 of 36 five minute exposures useable for a total of 2 hours 10 minutes.

Imaged starting 2022-05-01 02:32 UT. I stacked and processed 26 five minute exposures taken with a William Optics RedCat 250/51mm telescope, Baader UV/IR cut filter, ZWO ASI 533 MC camera, and SkyWatcher AZ-EQ5 mount, ASI EAF and guide camera. All were controlled with a ZWO ASIAir Plus Controller. Processed in PixInsight, StarXTerminator, Topaz DeNoise, and Photoshop.

Previous attempts with this target and data: M51 with the same data, first attempt from Fort Davis, and M51 imaged from Austin.