SH2-216 is the famous nearby PNe for which its apparent size on the sky is HUGE. It is interesting to learn that the white dwarf associated with this planetary nebula is significantly offset. (
https://www.researchgate.net/publication/234508852_The_Closest_Planetary_Nebula_SH_2-216_and_Its_Interaction_with_the_Interstellar_Medium)
As indicated in the link above it is the bulk motion of the sphere through the ISM that gives it an asymmetry in density and emission (as well as the white dwarf).
This image is a straight RGB (broadband). I did consider de-emphasizing the stars more... but then it just looks like a poor version of a narrowband image (which naturally has attenuated stars and a darker background). Of course if left completely alone- this field is *very* starry and does overwhelm the nebula. The image rendered here is my compromise. RGB broadband image of these kinds of faint targets come with some strenuous constraints- there isn't much wiggle room to push things.
@Salvatore Iovene A suggestion would be to allow a user to add an annotation (perhaps choosing from some symbols or text) to allow for customs labels to appear with the plate solution overlay. In this case, it would be useful for me to put and arrow and label the white dwarf which I mention in my description.
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