red FLIERS, I decided to try a deeper image in nitrogen and oxygen (NII and OIII):
This NII-OIII image suggests that the upper condensation is a red flier while the lower is not, as the lower condensation is absent in the narrow band image, but present in RGB-OIII image and the luminance (below) --probably a superimposed star.
Here's a blink of luminance (broad band including all visible wavelengths), followed by a green continuum filter (no narrow band emissions), then a stretched NII image. Which suggests that the upper condensation is an NII red flier, while the lower a broad band star. Not sure why i'm picking up the central glow with the continuum filter. reflection nebula? IR leak?
|NGC 6210 Luminance-Continuum-NII|
There is certainly a lower condensation in the OIII, almost looks like a smeared attempt at a red flier, also note the faint outer shell to the right:
|NGC 6210 OIII stretched|
The NII-OIII core may represent a letter in the krypton alphabet befitting our herculean superhero*:
|NGC 6210 NII-OIII linear|
Lastly here's a collage showing various filter images:
top: NII, OIII, NII-OIII color; linear stretch
mid: NII, OIII, NII-OIII color; non-linear stretch
bottom: continuum, luminance, NII-continuum
with 4 wings, but only one flier, the superturtle can fly, but slowly.
8" LX200R, SX Trius 694 0.4"/px
astrodon 3nm NII, 3nm OIII
NII 33x20 min, OIII 35x5,6x20 min, L 155x1 min, 545x50 79x2min