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The Fox Fur Nebula (Sharpless 273), Christmas Tree Cluster and the Cone Nebula (both catalogued under NGC 2264) | LHaRGB | by Steven Mohr
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The Fox Fur Nebula (Sharpless 273), Christmas Tree Cluster and the Cone Nebula (both catalogued under NGC 2264) | LHaRGB

“NGC 2264 describes several objects in the constellation Monoceros lying about 2,700 light-years from Earth. One is the Christmas Tree star cluster, here lying on its side with the blazing bright star S Monocerotis marking its trunk at Lower left. There is a diffuse red nebula caused by H-alpha emissions from hydrogen gas stimulated by ultraviolet radiation emitted by S Monocertis and the cluster's other white-blue stars. There are two special star forming regions in the red nebula. At centre right, off the tip of the Christmas Tree, is the Cone Nebula, named for its apparent shape sculpted by fierce stellar winds emitted from the stars. It is a dark molecular cloud within which other new stars are forming. Numerous other sculpted swirls of nebulosity are nearby. At centre left is the Fox Fur Nebula, Sharpless 273, named for the rich textured appearance sculpted by stellar winds in that region. In contrast, the blue nebula is a reflection nebula caused by scattered blue light reflecting off residual dust in a region where stars have already formed” [adapted text, credit SkyandTelescope].


The image is made up of a Luminance - Hydrogen Alpha blend for the resolution, and then a low resolution, small set of Red, Green, and Blue forming the colour channel. You can see I push the data a little too hard to reveal the detail, so maybe one day in the future I can collect more luminance and Ha to perhaps achieve a smoother result. But for the time being, I’m quite happy with the result from new Pixinsight procedures learnt.


Thanks for having a look.


Hi Res version:


Information about the image:


Instrument: Planewave CDK 12.5 | Focal Ratio: F8

Camera: STXL-11002 + AOX | Mount: AP900GTO

Camera Sensitivity: Lum+Ha: Bin 1x1, Red, Green, Blue: Bin 2x2

Exposure Details: Lum: 32 x 900sec [8hrs], Ha: 31 x 1200 [8hrs] RGB: 450sec x 6 each [2.25hrs]

Viewing Location: Central Victoria, Australia.

Observatory: ScopeDome 3m

Date: January-February 2018

Software Enhancements: CCDStack2, CCDBand-Aid, PS, Pixinsight

Author: Steven Mohr


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Uploaded on August 18, 2018