Sh2-88 Diffuse Nebula (Vulpecula), June 2023
Planewave CDK12.5; AP 1100GTO AE
ASI6200MM, - Antlia Pro RGB & 3.5nm NB filters
R,G,B: (16,9,9 x 120s exposures, Bin 2x2, Gain200)
H,O,S:(42,24,35 x 480s exposures, Bin 2x2, Gain 200)

Central in this image of Sh2-88 is a Dark Nebula that is obliterating much of the diffuse nebula and starlight behind it. This dark nebula also covers much of the bottom half of the image too, making it a bit of a puzzle to determine the overall structure of the emission nebulosity.
The largest portion of emission nebulosity is to the upper left of the dark cloud. It seems to be blown by, and energized from the stellar winds coming from one or more of the stars from the upper left corner. I am not sure how much of the “blue” is O++ emissions, and how much is reflection but I suspect primarily the former.
To the upper right of the central dark nebulosity are two additional compact brighter emmisson blobs (Sh2-88A and 88B). I suspect there are more to these than we can see – ther remainder being hidden by the dark nebulosity.
The entire field of view appears to contain dim emissions from a large molecular cloud – the brightness of which correlates well with the visible star density – indicating that the dark areas are not empty, but rather shielded by dark nebulosity.
Overall, I find that one has to think about these nebulae as 3-D objects, with portions overlapping each other and stars in front of, behind, and withing them to figure out their structural puzzle.