Celestial hemisphere:  Southern  ·  Constellation: Canis Major (CMa)  ·  Contains:  16 CMa)  ·  The star Udra (ο1 CMa
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Dolphin nebula from Winter Star Party, Alex Varakin
Dolphin nebula from Winter Star Party
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Dolphin nebula from Winter Star Party

Getting plate-solving status, please wait...
Dolphin nebula from Winter Star Party, Alex Varakin
Dolphin nebula from Winter Star Party
Powered byPixInsight

Dolphin nebula from Winter Star Party

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Description

This image was taken during Winter Star Party from Camp Wesumkee.
It was more of a filler image before my main target becomes visible. 
Despite very short total exposure, I am surprised that the image turned out OK, although it took a lot of careful processing.

Processing steps:
I started processing with extracting stars from the OIII image, then I did some very aggressive noise reduction using:
  • NoiseExterminator w/o mask
  • TVGDenoise w/o mask
  • MedianTransform with lum mask to clean up background

I also had to use clone stamp to eliminate remaining star halos.
After all that was done, I used NBColorMapper to produce color image out of OIII.
Processing RGB stars was very simple - spectroscopic color calibration, NXT, star extraction and finally star image stretch.
Biggest challenge was with one of the RGB channels which happened to have some satellite trail, which I had to eliminate using clone stamp.
And final step was just implanting RGB stars into OIII image using pixelmath.

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  • Dolphin nebula from Winter Star Party, Alex Varakin
    Original
  • Final
    Dolphin nebula from Winter Star Party, Alex Varakin
    B

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Dolphin nebula from Winter Star Party, Alex Varakin