Another supernova remnant in constellation Cygnus.

It 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.

Unfortunately the dew heater of the camera was accidentally switched off and a patch of dew right in the center of the camera window reduced the quality a large number of subframes and made calibration with flat files a bit doubtful.

But anyway … I am surprised by what I could get out of the data.

Hope you like it.

Borg 90FL
1.08 Flattener
ZWO OAG
ASI 2600MM Pro
ZWO EFW
Baader Ultra-Narrowband 3.5/4nm filters, Baader RGB filters
H: 32x300s
OIII:32x300s
SII:32x300s
R: 20x60s
G: 20x60s
B: 20x60s
Total Integration: 9h over 3 nights
Bortle 4-5, Partly with quite some Moon

PixInsight