Sh2-157
- Nebula in HaRGB
Click on the image to see it
at 2x resolution
Image Data:
Scope: AP155EDF
Camera: Apogee Moravian G4 (16803 ccd) w Astrodon Gen II Filters
Mount: Paramount MX
21 x 20 minutes H-Alpha
Approx 2.5 hour each of RGB
Lucknow, Ontario, Canada
Sept 2023
Images acquired using CCD-Commander and TheSkyX
Reduction and all pre-processing in PixInsight.
RGB processed in PixInsight using SPCC, BlurX, NoiseX then HistogramTransformation, Curves and a masked Saturation boost.
H-Alpha
processed in PixInsight using BlurX, NoiseX, StarX then
HistogramTransformation, Curves and LocalHistogramTransformation (for
contrast)
Moved to Photoshop where the channels were separated then
starless H-Alpha was added to Red at 100% and to Blue at 20% using
Lighten blend mode. RGB recombined.
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