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Contains:  M 52, NGC 7654, Bubble nebula, NGC 7635
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The Bubble Nebula (NGC 7635) and Open Cluster M52 (Ha + RGB), 


            Scott Davis
The Bubble Nebula (NGC 7635) and Open Cluster M52 (Ha + RGB)

The Bubble Nebula (NGC 7635) and Open Cluster M52 (Ha + RGB)

Technical card

Resolution: 3000x1911

Dates:Oct. 18, 2014Oct. 19, 2014Oct. 20, 2014Oct. 21, 2014

Astronomik 6nm Ha Clip-In Filter: 164x300" ISO1600
One-Shot Color: 56x150" ISO1600

Integration: 16.0 hours

Darks: ~25

Flats: ~40

Flat darks: ~40

Bias: ~40

Avg. Moon age: 25.89 days

Avg. Moon phase: 15.05%

Bortle Dark-Sky Scale: 5.75 job: 393399

RA center: 23h 22' 2"

DEC center: +61° 18' 10"

Pixel scale: 2.114 arcsec/pixel

Orientation: 131.723 degrees

Field radius: 1.044

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


The Bubble Nebula, shown at right, and catalogued as NGC 7635, is a large emission nebula in the constellation Cassiopeia. The bubble itself is created by hot stellar wind coming from the central star. The nebula is estimated to lie between 7,100 and 11,000 light years from Earth. To the left sits Open Cluster M52, which is easily viewable with both binoculars and modest telescopes. It is estimated to contain approximately 190 member stars and lies at a distance of approximately 5,000 light years from Earth.

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



Scott Davis
License: Attribution-NonCommercial-NoDerivs Creative Commons

Sky plot

Sky plot


The Bubble Nebula (NGC 7635) and Open Cluster M52 (Ha + RGB), 


            Scott Davis