Sharpless 140 - Emission Nebula in Cepheus

Sh2-140 : Emission Nebula in Cepheus

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From NOIRLab:
Sh2-140 is an HII emission nebula on the southwest edge of the Lynds 1204 dark nebula. It is also on the edge the Cephus Ring, a ring of molecular gas and dust. Invisible in this image, there are about fifty young stars deeply embedded in the dark gas in the lower-left corner of the image. 
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Scope: Planewave 12.5" CDK
Camera: Apogee U16M w Astrodon GenII LRGB
Mount: Paramount ME (MKS 5000 upgrade)
H-Alpha 6x20 min
R/G/B 6/7/6 x 10 min each
Images acquired w TheSkyX Professional and CCD-Commander
Processing in PixInsight:
- WBPP script
- H-Alpha processed further with BlurX, StarX then HT, Curves and NoiseX on the Starless image
- RGB combine followed by SPCC, BlurX, HT and Curves, NoiseX
Processing in Photoshop:
- RGB split into individual channels
- H-Alpha then layered onto Red @ 100% and Blue @20% using Lighten blend mode
- Curves and Colour Balance
- cleanup

Click on the image to see a larger version.

Lucknow, Ontario, Canada
June 2023

Here is the RGB only version of the same image without the H-Alpha data added