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Medusa Nebula (Abell 21)  Captured in Ha and OIII, 





    
        

            Chuck's Astrophot...
Medusa Nebula (Abell 21)  Captured in Ha and OIII

Medusa Nebula (Abell 21) Captured in Ha and OIII

Technical card

Resolution: 3084x2601

Dates:March 5, 2019March 11, 2019

Frames:
Astronomik Ha: 105x240" (gain: 139.00) -20C bin 1x1
Astronomik OIII: 54x240" (gain: 75.00) -20C bin 1x1

Integration: 10.6 hours

Darks: ~50

Flats: ~50

Bias: ~50

Avg. Moon age: 16.48 days

Avg. Moon phase: 11.11%

Astrometry.net job: 2583592

RA center: 112.252 degrees

DEC center: 13.269 degrees

Pixel scale: 1.012 arcsec/pixel

Orientation: 95.014 degrees

Field radius: 0.567 degrees

Data source: Backyard

Description

Some people also call this nebula the dolphin - which is easy to see. I'm glad I didn't wait until next season to capture this nebula, the weather finally cleared so I had time to get it done. I was surprised how bright it was in both Ha and OIII.

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YobSnob
Chuck's Astrophot...
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Medusa Nebula (Abell 21)  Captured in Ha and OIII, 





    
        

            Chuck's Astrophot...