@Polaris 15 March 2021 more from that month

An image from October 2020, but just reprocessed with a lot more "know how" than I had 5 months ago. The Triangulum Galaxy, M33 about 2.723 million light years from Earth. Mostly photographed with Optolong L-Pro filter, but with some additional Ha data, obtained using L-Extreme filter. Image processed in Astro Pixel Processor and Photoshop. 19.5 Hours of imaging with subs of 5 minutes and at unity gain. W.O. Zenithstar 81, ZWO ASI 183mc pro, Skywatcher HEQ5 pro mount, guided and controlled by ZWO ASIAIR pro. Caldicot, Wales, UK. Bortle 5 Posted by: Allen Lloyd #Astronomy