So after weeks of clouds obscuring my view of the hailed "green comet" (lol, they are all green?) I finally got my chance. This was on the back side of the return on 2023-02-10. I was aiming for Mars in the shot, and I got that. Then I also happened to get Barnard 22 dark nebula. The interesting thing is that the nebula doesn't move, Mars moves at a planet rate, and the comet at its rate. That was cool. But the processing and light pollution got the best of me. I had halos on Mars, and the nebula had an odd dark halo. I didn't have calibration frames. A mess really. Had to crop down to just the comet. I'm not 100% satisfied with this output, but I ran out of time to do much more with it.
I referenced these videos in doing the comet post-processing in APP and GIMP:
How To Process A Comet With Round Stars using Astropixel Processor, Starnet++ and PhotoshopAstropixel Processor TutorialPhotographing a COMET (Pt. 2) - Siril and GIMPIn the first version of this comet processing it is the pure comet view from APP, and you can see a little bit of the long tail pointing to the left while the coma feathers above. That faint tail didn't really come through in the final.
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