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Contains:  NGC 6995, Network nebula, NGC 6992, IC 1340, Veil nebula, Lace-work nebula, Filamentary nebula, NGC 6960, The star 52Cyg
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Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic, 





    
        

            Ram Samudrala
Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic

Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic

Technical card

Resolution: 4538x5993

Dates:July 10, 2019July 12, 2019July 13, 2019July 15, 2019

Frames:
Astrodon Ha 1.25 5nm: 81x360" (gain: 200.00) -15C bin 1x1
Astrodon OIII 1.25 3nm: 49x360" (gain: 200.00) -15C bin 1x1
Astrodon SII 31mm 3nm: 30x360" (gain: 200.00) -15C bin 1x1

Integration: 16.0 hours

Darks: ~40

Avg. Moon age: 10.99 days

Avg. Moon phase: 82.29%

Bortle Dark-Sky Scale: 3.00

Mean FWHM: 3.00

Temperature: 15.00

Astrometry.net job: 2808733

RA center: 312.850 degrees

DEC center: 30.408 degrees

Pixel scale: 2.316 arcsec/pixel

Orientation: 358.680 degrees

Field radius: 2.418 degrees

Locations: Ram Samudrala, Youngstown, NY, United States

Data source: Backyard

Description

The Veil nebula and regions within located in the Cygnus constellation are known by many names, including Filamentary, Cirrus, Network, and Witch's Broom. This capture is my first attempt at creating a (two panel narrowband) mosaic and perhaps my last since after doing this I feel I should stick to my general philosophy of using the right sensor/reducer/OTA combination for the right target (though the North America nebula beckons and I don't see how I can get it to fit in a single panel unless I switch to using camera lenses). It was a PITA to get the brightness and noise levels of the panels matched up properly and also bring out the faint wispy details while imaging during moonlight though I learnt a lot about PixInsight doing this.

This was an interesting target for many reasons, beyond my two panel struggle. The Ha areas largely over encompass the O3 and S2 regions, but both of these also have very strong signal and if I had done an image excluding Ha it would've looked rather similar (except for the very faint bits). The S3 overlap is near 100% with the other two elements and if I hadn't brought down the Ha (which is still overwhelming) there would've been a lot of white as a result of the RGB combination. I chose to find a balance between choosing a post processing scheme that aesthetically looked good from afar while also showing the details of the filaments but the Ha only image really shows how intricate the filament work is. IMO, these narrowband images take a lot of artistic license and are best appreciated in comparison to the monochromatic signal from the individual filters, particularly Ha.

My plan is to repeat this with my OSC on the SV70T and by rotating the camera by 90 degrees I can get it to fit, which will a generate a colour image, and and then if possible I will create a merged SHO-RGB image by combining all of these captures.

Comments

Author

ramdom
Ram Samudrala
License: Attribution Creative Commons
1721
Like

Revisions

  • Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic, 





    
        

            Ram Samudrala
    Original
  • Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic, 





    
        

            Ram Samudrala
    B
  • Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic, 





    
        

            Ram Samudrala
    C
  • Final
    Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic, 





    
        

            Ram Samudrala
    D
  • Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic, 





    
        

            Ram Samudrala
    F
  • Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic, 





    
        

            Ram Samudrala
    G

B

This is the Ha only image.

C

Slight cleanup.

F

More subtle processing and darker background but this causes the fainter regions to fade away.

G

SHO image without the Hubble palette colour tweaks, which I think looks pretty good by itself.

Sky plot

Sky plot

Histogram

Veil nebula - West C34/Ced182a/NGC6960/LBN191/PGC3517684 and East C33/Ced182b/IC1340/NGC6992/NGC6995 (c-sho) two panel mosaic, 





    
        

            Ram Samudrala