Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888  ·  Sh2-105
Crescent Nebula and Soap Bubble (SV130), Carl
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Crescent Nebula and Soap Bubble (SV130)

Crescent Nebula and Soap Bubble (SV130), Carl
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Crescent Nebula and Soap Bubble (SV130)

Equipment

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Acquisition details

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Description

A week of clear skies yielded a nice opportunity for me to continue to run both my refractors from my Bortle 8 driveway.  I've imaged the Crescent Nebula way back when I first started, so it was very rewarding to come back to it now that I have better equipment, data, and processing skills.  I got some of the Soap Bubble in the frame, which I did not expect, and I got some of the OIII loop that extends from the main Crescent - though, I avoided over stretching it for the sake of the background.  I now see the value of getting extra time in OIII on this target for the details.

More time would also probably help StarNet do a better star removal.  I had to stretch all mono images first before StarNet produced a reasonable star mask and starless image.  Otherwise, the starless images were full of holes.  But, doing the stretch and then star removal worked very nicely, especially in Ha.  I also tried Bill Blanshan's pixel math scripts for HSO and SHO combinations.  I included a few permutations in this submission, as I can't really decide which I like best.  I like the cloudy nebulosity of the SHO combination but the Cresecent color and definition in the first HSO combination.  C'est la vie.  Enjoy.

Comments

Revisions

  • Final
    Crescent Nebula and Soap Bubble (SV130), Carl
    Original
  • Crescent Nebula and Soap Bubble (SV130), Carl
    B
  • Crescent Nebula and Soap Bubble (SV130), Carl
    C

B

Title: SHO

Description: An alternate combination, in SHO.

Uploaded: ...

C

Title: Alternate HSO

Description: Prior to the Blanshan script, I had this HSO combination.... pretty RED, but not too bad, IMO.

Uploaded: ...

Sky plot

Sky plot

Histogram

Crescent Nebula and Soap Bubble (SV130), Carl