webcubus, Abell 31/SH2-290 is a very large, but faint planetary nebula in the constellation Cancer. I knew I was in for a challenge when I took my first 10 minute sub of this object and could barely make it out. I gathered 30 hours of exposure time, but it could use a great deal more to help control the noise with the extensive stretching needed.
Astrobin: https://www.astrobin.com/e8fkaa/
#nebula #colorful #red #blue #space #stars #astrophotography #narrowband #skywatcherusa #qhyccd