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The Cave Nebula (Ha + RGB), 





    
        

            Scott Davis
The Cave Nebula (Ha + RGB)

The Cave Nebula (Ha + RGB)

Technical card

Resolution: 2000x1240

Dates:Aug. 5, 2015Aug. 11, 2015Aug. 12, 2015Aug. 14, 2015Nov. 6, 2015

Frames:
Astronomik 6nm Ha Clip-In Filter: 65x600" ISO1600
One-Shot Color: 20x300" ISO1600

Integration: 12.5 hours

Darks: ~15

Flats: ~40

Flat darks: ~40

Bias: ~40

Avg. Moon age: 25.76 days

Avg. Moon phase: 20.91%

Bortle Dark-Sky Scale: 6.33

Astrometry.net job: 837664

RA center: 343.528 degrees

DEC center: 62.449 degrees

Pixel scale: 3.148 arcsec/pixel

Orientation: 178.619 degrees

Field radius: 1.029 degrees

Locations: My Backyard, Clovis, California, United States; Big Stump, Kings Canyon National Park, CA, United States

Description

The Cave Nebula, catalogued as Sharpless 2-155 or Cardwell 9, is a very faint emission nebula in the constellation Cepheus. While extremely difficult visually in the best of telescopes, the pockets of gas, dust lanes, and even an area of reflection nebula make for a beautiful photographic target. Its distance is estimated to be approximately 2,400 light years from Earth.

RGB data was captured from Big Stump in Kings Canyon National Park. Hydrogen-Alpha data was captured from my backyard in Clovis, California.

Comments

Author

scodavis
Scott Davis
License: Attribution-NonCommercial-NoDerivs Creative Commons
1481
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The Cave Nebula (Ha + RGB), 





    
        

            Scott Davis