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Cygnus Loop in HaS2_O3_O3Ha

astrophotography
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#1 SilverLitz

SilverLitz

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Posted 27 October 2020 - 12:35 PM

Here is my Cygnus Loop in HaS2_O3_O3Ha , from my suburban Louisville, KY backyard. It was shot with my ASI183mm-Pro and Baader 36mm NB filters, using my Samyang 135mm f/2.0 at f/2.8 (mainly).   Processed with PixInsight.  Cygnus Loop is Super Nova remnant in constellation Cygnus and is about 2,400 light years from Earth.  The Cygnus Loop includes the Western Veil (aka "Witch's Broom"), Eastern Veil (aka "Bat Wing" or my preferred "Joker's Face"), and Pickering's Triangle.

 

Ha             240sec x 245 at f/2.8

Oiii             240sec x 123 at f/2.8

Oiii             120sec x 140 at f/2.0  (mistaken wide open)

Sii              240sec x 153 at f/2.8

 

This color palette is a slight modification from HOO, and is close to true color.

Red                Ha + Sii

Green             Oiii

Blue               Oiii + 0.2*Ha

 

The Ha into Blue is meant to be a surrogate of Hb.

 

I have also added a mild Hue "S-Curve" to move some of the Oiii from Aqua to a truer Blue and moved the Red to deeper Red.  This Hue adjustment is much milder than what I would do for SHO palette.

 

CygLp_HaS2_O3_O3Ha (LoRes).jpg


  • diggy, suburbanastro, Dean J. and 6 others like this

#2 KD58

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Posted 27 October 2020 - 01:04 PM

Superb capture and processing.


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