The Cave Nebula (SH2-155)


Ten hours of integration time

PixInsight Processing of SHO images
Standard process, but use dynamic background extraction instead of automatic
channel extraction to work on RGB components with Histogram transformation and NoiseXterminator.  SCNR 0.78.  Luminance mask to darken background.  Blurred color masks, use green to get goldish yellow nebula color and refinements using red and yellow masks, and brighten the blue background, apply NoiseXterminator again and DarkStructureEnhance










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