17 Apr 2026
I used Siril to take the stacked fits color component files to provide a better composition and used the Siril manual align feature to align the component images including the Blue this time. Lastly I increased the exposure slightly for the Blue data & then cropped and post processed the final image in Gimp. By aligning the blue, you can now see purple in the wings of the butterfly.
NGC 6302
10 credit