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Contains:  Crescent nebula, NGC 6888
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NGC-6888 (Crescent Nebula), 





    
        

            Joel Shepherd
NGC-6888 (Crescent Nebula)

NGC-6888 (Crescent Nebula)

Technical card

Resolution: 1600x1297

Dates:July 23, 2018July 24, 2018Aug. 4, 2018Aug. 7, 2018

Frames:
Astrodon 1.25" 3nm SII: 21x600" bin 1x1
Astrodon 3nm OIII 1.25: 24x600" bin 1x1
Astrodon 5nm H-alpha: 21x600" bin 1x1

Integration: 11.0 hours

Avg. Moon age: 17.38 days

Avg. Moon phase: 61.98%

Bortle Dark-Sky Scale: 6.00

Astrometry.net job: 2218966

RA center: 302.891 degrees

DEC center: 38.521 degrees

Pixel scale: 3.863 arcsec/pixel

Orientation: 33.704 degrees

Field radius: 1.105 degrees

Locations: Home, Seattle, WA, United States

Data source: Backyard

Description

This is the first time I've imaged this target in color, and it proved a little more challenging than expected. A large part of the difficulty was, unfortunately, smoke: smoke from wildfires in British Columbia, eastern Washington, Oregon, California and even Siberia, all of which passed through Seattle at various points this month. I discarded almost 40 O-iii subs over three nights due to sheets of smoke passing through at various times.

That aside, I really like the field: the oxygen rich Crescent riding on deep red waves of hydrogen and sulfur. Rather evocative of the fires around us.

Comments

Author

JoelShepherd
Joel Shepherd
License: Attribution Creative Commons
1862
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NGC-6888 (Crescent Nebula), 





    
        

            Joel Shepherd