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Contains:  NGC 7510
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The Claw Nebula Sh2-157 (Ha + O3 + RGB), 


            Scott Davis
The Claw Nebula Sh2-157 (Ha + O3 + RGB)

The Claw Nebula Sh2-157 (Ha + O3 + RGB)

Technical card

Resolution: 3000x2009

Dates:Oct. 24, 2014Oct. 25, 2014Oct. 26, 2014Oct. 27, 2014Oct. 28, 2014Oct. 29, 2014Nov. 15, 2014

Astronomik 12nm OIII Clip-In Filter: 221x180" ISO1600
Astronomik 6nm Ha Clip-In Filter: 196x300" ISO1600
One-Shot Color: 53x150" ISO1600

Integration: 29.6 hours

Darks: ~40

Flats: ~40

Flat darks: ~40

Bias: ~40

Avg. Moon age: 5.92 days

Avg. Moon phase: 17.20%

Bortle Dark-Sky Scale: 6.43 job: 413063

RA center: 23h 14' 43"

DEC center: +60° 4' 8"

Pixel scale: 2.129 arcsec/pixel

Orientation: -90.471 degrees

Field radius: 1.068

Locations: My Backyard, Clovis, California, United States; Eastman Lake Recreation Area, Raymond, CA, United States


The Claw Nebula, catalogued as Sh2-157, is a large but faint emission nebula in the constellation Cassiopeia. Also visible in this image, at lower right, is the easily-recognizable open cluster NGC 7510. The nebula is very close in the sky to the Elephant Trunk Nebula.

RGB color data was captured from Eastman Lake Recreation Area. The Hydrogen-Alpha and Oxygen-III narrowband data was captured from my backyard in Clovis, California.



Scott Davis
License: Attribution-NonCommercial-NoDerivs Creative Commons

Sky plot

Sky plot


The Claw Nebula Sh2-157 (Ha + O3 + RGB), 


            Scott Davis