Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  LBN 203  ·  NGC 6888  ·  Sh2-105
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Crescent Nebula, narrowband-enhanced, Frank Kane
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Crescent Nebula, narrowband-enhanced

Getting plate-solving status, please wait...
Crescent Nebula, narrowband-enhanced, Frank Kane
Powered byPixInsight

Crescent Nebula, narrowband-enhanced

Equipment

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Acquisition details

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Description

This is my second attempt at imaging the Crescent Nebula, now that I can reliably automate image capture all night long and have a few more processing tricks.

Revision "A" is just from data collected this year, about 5 hours' worth, and combines narrowband "synthetic RGB" data with RGB stars. But, it has too much noise.

Revison "B" integrates in another session from over a year ago. I was worried the expansion of the nebula over that time might be an issue, but it wasn't. In this take, we have RGB color data using narrowband "synthetic RGB" data as luminance.

And in Revison "C" - it's just straight-up synthetic RGB, tossing out the RGB data entirely. It makes the OIII shell pop more, and the star colors still look reasonable.

Revision "D" is just HOO.

Revision "E" has natural levels of narrowband data; they are not linearly fitted to each other. And I used a color palette that has no scientific meaning apart from looking pretty.

Comments

Revisions

  • Crescent Nebula, narrowband-enhanced, Frank Kane
    Original
  • Crescent Nebula, narrowband-enhanced, Frank Kane
    B
  • Crescent Nebula, narrowband-enhanced, Frank Kane
    C
  • Crescent Nebula, narrowband-enhanced, Frank Kane
    D
  • Final
    Crescent Nebula, narrowband-enhanced, Frank Kane
    E

B

Description: RGB color data with synthetic-RGB luminance.

Uploaded: ...

C

Description: Synthetic RGB, with data from last year added in.

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D

Description: HOO processed.

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E

Description: Mostly I chose to not linear-fit the narrowband channels this time. Looks a lot nicer now.

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Sky plot

Sky plot

Histogram

Crescent Nebula, narrowband-enhanced, Frank Kane