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Perseus Double Cluster - NGC 869 and NGC 884, Rowland Archer
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Perseus Double Cluster - NGC 869 and NGC 884

Getting plate-solving status, please wait...
Perseus Double Cluster - NGC 869 and NGC 884, Rowland Archer
Powered byPixInsight

Perseus Double Cluster - NGC 869 and NGC 884

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Description

NGC 869 / 884 in Perseus - RGB

Shot 100 each of R, G, B, kept 66 R, 49 G, 72 B. Shot 500 L's and decided that L didn't add anything to this after processing as RGB and LRGB both. L had some saturation that resulted in blotchy color in a few of the brighter stars.

Pre-processed with the new 1.060 AstroPixelProcessor which has multi-channel processing. I think it does a great job.

Then over to PI for ABE 3 times, DBE once, MLT Noise Reduction, HistogramTransformation, TGV Denoise, a bit of Curves to boost contrast and saturation, and a bit of color touchup with Saturation. Actually reduced the red a bit as some of the red stars looked unnatural to me.

Brought into Photoshop CC for Bodoni tools' "increase star color" which had a subtle effect, and resized and saved. And here we are!

A bit of what looks like chromatic aberration is visible in the brighter stars (red fringe on one side, blue on the other). I don't think it's from the optics as I haven't seen it in other shots with the same rig. I think it may be alignment, maybe red and blue taken on opposite sides of the meridian? AstroPixelProcessor's "align channels" option cleaned this up considerably compared to the result I was getting in PI.

Comments and criticism welcomed, always looking for ideas to improve!

Thanks for stopping by,

Rowland

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Revisions

  • Final
    Perseus Double Cluster - NGC 869 and NGC 884, Rowland Archer
    Original
  • Perseus Double Cluster - NGC 869 and NGC 884, Rowland Archer
    B
  • Perseus Double Cluster - NGC 869 and NGC 884, Rowland Archer
    C
  • Perseus Double Cluster - NGC 869 and NGC 884, Rowland Archer
    E

B

Description: 1920x1080 sized version

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C

Description: 800x600 sized version

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E

Description: Re-processed using APP's quality estimator for integration weighting instead of SNR. Also a bit less contrasty, slightly lighter BG

Uploaded: ...

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Perseus Double Cluster - NGC 869 and NGC 884, Rowland Archer

In these public groups

ZWO ASI1600MM/QHY163M

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