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Contains:  NGC 6995, Network nebula, NGC 6992, IC 1340, Veil nebula, Lace-work nebula, Filamentary nebula, NGC 6960, The star 32Vul, The star 31Vul, The star 52Cyg
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Cygnus Loop (Ha + O3 + RGB), 


            Scott Davis
Cygnus Loop (Ha + O3 + RGB)

Cygnus Loop (Ha + O3 + RGB)

Technical card

Resolution: 3000x1979

Dates:July 23, 2014July 25, 2014Aug. 16, 2014Aug. 17, 2014Aug. 18, 2014Aug. 22, 2014Aug. 24, 2014

Astronomik 12nm OIII Clip-In Filter: 278x180" ISO1600
Astronomik 6nm Ha Clip-In Filter: 140x300" ISO1600
One-Shot Color: 69x90" ISO1600

Integration: 27.3 hours

Darks: ~30

Flats: ~50

Flat darks: ~50

Bias: ~50

Avg. Moon age: 25.18 days

Avg. Moon phase: 24.72%

Bortle Dark-Sky Scale: 6.29 job: 356463

RA center: 312.800 degrees

DEC center: 29.742 degrees

Pixel scale: 7.838 arcsec/pixel

Orientation: 90.091 degrees

Field radius: 3.912 degrees

Locations: My Backyard, Clovis, California, United States; Courtright Reservoir, Shaver Lake, California, United States


The Cygnus Loop is a supernova remnant from a start that is estimated to have exploded approximately 7,000 years ago. The vast amount of gasses from the explosion continue to expand out into space and will continue to do so for a very long time.

To be honest, I'm a bit underwhelmed with the way this turned out. First, some of the narrowband details are still faint due to the light pollution from my back yard. Either way, the image is finished, at least for now. It's still a pretty field of view.

RGB frames were captured from Courtright Reservoir. H-Alpha and Oxygen-III frames were captured from my backyard.



Scott Davis
License: Attribution-NonCommercial-NoDerivs Creative Commons

Sky plot

Sky plot


Cygnus Loop (Ha + O3 + RGB), 


            Scott Davis