Unfortunately the steps are all in Photoshop, so I had to work out how to do them in GIMP, but it seems to have worked. I wanted to see if I could do this entirely in free software, but couldn’t get the noise reduction to work so there’s a bit of Pixinsight in here, but otherwise it’s all done with free stuff.
Capture details are: Canon DSLR on 130PDS – Disc is stack of 30 of 1/500s, halo is a single jpeg at 1/10 sec
Processing is: Converted to avi by Pipp, stacked in Autostakkert, Saturation and Layers in GIMP and Noise reduction in Pixinsight MLT.
Predicted to be cloudy on 21/12/2020, the night of closest approach (which turned out to be correct), I opted to go out night before.
Blobby because I used Sky Watcher Equinox 80mm and Altair Astro 183M to take this photo (single frame) rather than my SkyMax 180mm + planetary video camera (which had been plan but planetary pair so low in sky close to roof of neighbouring house than I went for safety with something I could guarantee).