Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888  ·  The star 34Cyg  ·  The star 36Cyg  ·  The star 40Cyg  ·  The star 42Cyg  ·  The star Sadr (γCyg)
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Sadr Region, Don Walters
Sadr Region
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Sadr Region

Getting plate-solving status, please wait...
Sadr Region, Don Walters
Sadr Region
Powered byPixInsight

Sadr Region

Equipment

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Acquisition details

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Description

Because I was shooting this during the full moon most of last week, I decided not to take any OIII because it would be loaded with moonlight.  So opted to shoot only H-alpha and SII.

In Pixelmath synthesized a 3rd channel, using 80% SII and 20% H-alpha to help me get more color.

Used Photometric Color Calibration which seemed to help a lot.  I also used StarNet to remove the stars while I did sharpening and noise control, which I tried to keep to a minimum.

Pixinsight Steps:
  1. DBE
  2. MLT noise reduction
  3. Photometric Color Calibration
  4. Histogram Transform (going non-linear)
  5. StarNet to separate stars
  6. ACDNR for noise control on the nebula
  7. Unsharp Mask on the nebula
  8. HDRMT
  9. Curves transformation to de-saturate the stars
  10. Pixelmath to rejoin the stars image
  11. Exponential Transformation for a final boost

Comments

Sky plot

Sky plot

Histogram

Sadr Region, Don Walters