Great image Rick.
Abell 78 and 79 are among my favourite planetary nebulae.

Stefan


"WA0CKY" schrieb im Newsbeitrag ...


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. It's
usually imaged in narrow band 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 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

Post edited to remove an advertising link it inserted into my post.

Rick


--
WA0CKY