Contains: NGC 6910, gamma Cyg nebula, IC 1318, The star Sadr (γCyg)
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Sadr region in Cygnus

Technical card

Resolution: 5166x3411

Dates: Sept. 18, 2012

Frames: 32x10"

Integration: 0.1 hours

Avg. Moon age: 2.65 days

Avg. Moon phase: 7.73% job: 132336

RA center: 305.552 degrees

DEC center: 40.265 degrees

Pixel scale: 1.574 arcsec/pixel

Orientation: -83.182 degrees

Field radius: 1.353 degrees

Locations: Home Observatory, Quincy, Illinois, United States


This is a second attempt to process the first upload of my Sadr region image. My conclusion is that, given the data I was able to collect at my light polluted site, carrying processing further only degrades the image.

Here are the PixInsight tools I applied to this image: AutomaticBackgroundExtraction, BackgroundNeutralization, SCNR (remove green cast), HistogramTransformation, CurvesTransformation, MultiscaleMedianTransform (noise reduction first 3 layers).

Conclusion: It took a light touch with most of these tools to avoid making a marginal image worse. As a result, the background nebulosity (red) is barely discernable.

Critiques are always welcome.




Sky plot

Sky plot


Sadr region in Cygnus, 



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