I recently posted already a part of this nebula complex, catalogued as Sh2-91.

This is now a different part and I took some more exposures to get more details from this very faint object and I had definitively no dew on the camera this time.
This supernova remnant is very similar in size and appearance to the better known Veil Nebula, also in Cygnus, but much fainter and therefore less frequently imaged. The progenitor star exploded about 30000 years ago in assistance of about 2600 – 3000 light years and the expelled outer shells of the star span today an area in the sky with an diameter of 8 times the full moon. So what you see here is just the southern part of the nebula.
The image is build from narrow band frames of Sulfur, Oxygen and Hydrogen for the nebulae using a classic SHO technique and additionally from broad band RGB data just for the stars.

Borg 90FL
1.08 Flattener
ZWO OAG
ASI 2600MM Pro
ZWO EFW
Baader Ultra-Narrowband 3.5/4nm filters, Baader RGB filters
H: 48x300s
OIII:50x300s
SII:49x300s
R: 20x60s
G: 20x60s
B: 20x60s
Total Integration: 13h15m over 4 nights
Bortle 4-5, no moon

PixInsight