Abell 13 (A66 13, PK 204-08 1, G204.0-08.5 and others) is a planetary nebula located approximately 3,900 light-years away in Orion. Others have observed that this one doesn’t appear to have an OIII component. Other images in Ha tend to not show more detail that I picked up with LRGB.
Luminance – 27x600s – 270 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
390 minutes total exposure – 6 hours 30 minutes
Imaged November 15th and 16th, 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/32069729568/sizes/l