vdB 136 in HaRGB in Cygnus

vdb 136 HaRGB

The above image is Ha+RGB done using the HaRGB_Combine processin PixInsight then some tweaks in Photoshop

vdB 136 is a reflection nebula in the constellation Cygnus, notable for its unusual yellow color. It's illuminated by the red giant star HD 196819. The nebula is also surrounded by emission nebulae (LBN 312) and dark nebulae.

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Here's the pure RGB for comparison:

vdB 136 RGB
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Camera: Moravian G4 w Astrodon Gen II LRGB filters
Scope: Astro-Physics AP155EDF w 4" FF
Mount: SB Paramount MX
Guiding: SBIG ST402ME on Borg 60 guidescope
15/15/16 x 10min each for RGB; 22 x 20min H-Alpha
Lucknow, Ontario, Canada
July 2025
Images captured with TheSkyX
Session orchestrated by CCD-Commander
Calibration and processing of the RGB and H-Alpha in PixInsight as follows:
RGB: SPCC, BlurX, NoiseX, Gradient, Curves, HistogramTransform
H-Alpha: BlurX, NoiseX, StarX, Curves and HT and LHE
Combine the Ha with the RGB via the process HaRGB_Combine

Photoshop processing:
Colour balance, some bad column artifact removal
Tweaks and small noise reduction then Save-for-Web

Click on the image to see it 2x enlarged.

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