SH2-82 The Little Cocoon (Michael Feigenbaum)

SH2-82 The Little Cocoon

Here we have SH2-82, The Little Cocoon Nebula. This is an emission/reflection nebula located in 1,100p away in the constellation Sagitta.

This is a star nursery and has some similarities to The Cocoon nebula and The Trifid Nebula.

The bright star near the center of it is HD 231616 which ionizes the cloud of gas and dust. As much as I like the bright and colorful nebula, I also liked the dark nebulae that appear in this frame and tried to preserve and highlight that as much as I could.

This was a nice project to do and I decided to try to use Ha and Oiii to try to enhance the reflection and emission nebula. The Oiii data was weak as with any Oiii filter I've used with HyperStar, reflections from any moderately bright star really causes problems. My cables across the corrector plate were not quite at 90 degrees so the diffraction spikes are a little off too.

I would have liked to do a little more RGB on this but alas, the monsoon season is upon us and I thought the night of July 10 was going to be my last chance. I also have learned that it just does not pay to try to do RGB with the moon present so I packed all the RGB into the time between astro dark and when the moon rose. Fortunately for me, i do have a mountain near me to the east which gave me a litle more time before the moon appeared.

Anyway, I hope you like this one... comments/criticism always encouraged.

CS and good health...

Original
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Description: Early iteration, just Ha + L. I put this in the staging area just to see what it would look like. You might notice this is a mirror image of the main image. That's a HyperStar thing...

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	3662634
PixInsight job	XMVZAZHDMOJP89X9RV3LXH1YZV4Z8H7H
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h30m15s.375
RA (top/left)	19h30m53s.764
RA (top/right)	19h33m00s.303
RA (bottom/right)	19h29m36s.655
RA (bottom/left)	19h27m31s.146

Dec (center)	+18°16′52″.72
Dec (top/left)	+17°33′57″.22
Dec (top/right)	+18°36′51″.58
Dec (bottom/right)	+18°59′51″.80
Dec (bottom/left)	+17°56′47″.23

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