Abell 16 (PK 153+22 1 and others) is a bubble planetary nebula located approximately 4,445 light-years away in Lynx.
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
360 minutes total exposure – 6 hours
Imaged November 17th, 18th, 20th and December 3rd, 2018 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
LRGB - https://www.flickr.com/photos/dcrowson/46151138575/sizes/l