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Contains:  Blue Snowball, NGC 7662
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Caldwell 22, 





    
        

            Joshua Judkins

Caldwell 22

Technical card

Resolution: 2094x1515

Dates:Sept. 5, 2018

Frames:
ZWO 1.25" Luminance: 301x1" (gain: 120.00) -10C bin 1x1
ZWO Ha 7nm 1.25": 12x1" (gain: 120.00) -10C bin 1x1
ZWO OIII 7nm 1.25": 303x1" (gain: 120.00) -10C bin 1x1

Integration: 0.2 hours

Darks: ~150

Flats: ~20

Avg. Moon age: 24.71 days

Avg. Moon phase: 24.08%

Bortle Dark-Sky Scale: 6.67

Astrometry.net job: 2339175

Data source: Backyard

Description

NGC 7662, Caldwell 22, or colloquially the Blue Snowball Nebula. This planetary nebula is 2000 - 6000 light years away in the constellation Andromeda. It has a very high surface brightness with inner structure revealed in larger instruments. Though it looks very small, it's about 1 light year in diameter. Luminance was used for blue, OIII for Green, and Halpha for Red. Inset image is a zoomed view of the nebula.

Comments

Author

chembio
Joshua Judkins
License: None (All rights reserved)
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Revisions

  • Caldwell 22, 





    
        

            Joshua Judkins
    Original
  • Caldwell 22, 





    
        

            Joshua Judkins
    B
  • Final
    Caldwell 22, 





    
        

            Joshua Judkins
    C

Histogram

Caldwell 22, 





    
        

            Joshua Judkins