Abell 78 AKA PNG 081.2-14.9 and PK 081-14.1 (among many aliases) is a blue planetary nebula in eastern Cygnus. The only distance estimate I found for it puts it some 700 parsec's from us +/- 125 parsecs (2300 light-years +/- 400 for the parsec challenged). It's usually imaged in narrowband using OIII and H alpha. Since most of its light is OIII and I don't currently have that filter I stuck to pure LRGB imaging. I found the H alpha so weak it barely showed in the red data. Certainly adding no red to the final image. Papers indicate it is interacting with the interstellar medium it is flying through or is the medium flying through it? This may account for its squashed shape of the OIII ring. Other papers say the core region is severely lacking in Hydrogen but the outer regions have a normal level. The central star is quite bright compared to the very faint one in Abell 80 I posted just before this.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME