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Crescent Nebula | by kappacygni
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Crescent Nebula

Emission nebula in Cygnus formed by the fast stellar wind from the central massive Wolf-Rayet star colliding with and energizing the slower moving wind ejected by the same star from an earlier phase of its life.

 

The recently discovered soap bubble planetary nebula is also faintly visible at mid top of frame - see note. By way of interest, here is a link to the story of its discovery, using amateur equipment

www.starimager.com/Image%20Gallery%20Pages/Hydrogen%20Alp...

 

This image is a natural colour mapping version of last year's data + also some star colour I had from the Canon 450D

The original HST mapped version here:

www.flickr.com/photos/42731607@N08/6320008406/in/photostream

  

Tech details below:

 

TMB 92ss + Borg DG-L .85x reducer @ F4.7

Mount - EQ6

Starlight Xpress SXVR-H18 @ -20 degs

QHY5 PHD guiding, guidesope Meade 127

 

Ha - Baader 7nm - 15x12min

OIII - Baader 8nm - 15x12min

SII - Baader 8nm - 15x12min

 

9 hours total

 

Captured in Nebulosity 2

Calibration, stack and DDP in Images Plus

Curves + all other processing PS CS3

 

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Taken on May 13, 2012