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SH2-82, Little Cocoon Nebula, HaLRGB

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#1 kathyastro

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Posted 14 September 2019 - 12:57 PM

Little Cocoon Nebula, Sh2-82, in HaLRGB. I am not totally happy with the colour, which was shot last night under the full harvest moon. But I am pleased with the results. This is a very dim target.

 

Orion 200mm f/4 Newtonian
Atik 383L+

 

Ha: 12x 600s, 1x1
L: 12x 300s, 1x1
RGB: 12ea 120s, 2x2

 

Total exposure: 4h12m

 

HaLRGB-p1-1000px.jpg


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#2 stargazer60

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Posted 14 September 2019 - 01:05 PM

Very nice image like you said considering the sky conditions. Thanks for posting it. 


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#3 Jim Thommes

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Posted 15 September 2019 - 01:42 PM

Good looking image. Nicely done.


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#4 kathyastro

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Posted 16 September 2019 - 08:00 AM

I reprocessed the image, dropping three Lum frames that were taken under the full Moon. The colour frames are still from the full Moon night, but now all the Lum frames are under a dark sky. The Ha frames are moonlit, but are pretty much immune to the effects of the evil orb.

 

Orion 200mm f/4 Newtonian
Atik 383L+

 

Ha: 12x 600s, 1x1
L: 9x 300s, 1x1
RGB: 12ea 120s, 2x2

 

Total exposure: 3h58m

 

HaLRGB_p3-1000px.jpg


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#5 RandallK

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Posted 16 September 2019 - 11:55 AM

That is much better with more contrast there Kathy.  If you have Photoshop, there is an excellent plug-in called Astro-Flat Pro...does magic on any gradient in one click!


Edited by RandallK, 16 September 2019 - 11:55 AM.

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