Hemisphere:  Northern  ·  Constellation: Gemini (Gem)
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Abell 21 in SHO+RGB, 



    
        

            Erik Pirtala
Abell 21 in SHO+RGB
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Abell 21 in SHO+RGB

Getting plate-solving status, please wait...
Abell 21 in SHO+RGB, 



    
        

            Erik Pirtala
Abell 21 in SHO+RGB
Powered byPixInsight

Abell 21 in SHO+RGB

Technical card

Imaging telescopes or lenses: GSO 6" f/4 Imaging Newtonian Telescope

Imaging cameras: ASI1600MM-C

Mounts: SkyWatcher EQ-6 Pro, SkyWatcher EQ-6 Pro

Focal reducers: Sky-watcher f/4 Aplnatic coma corrector

Software: Sequence Generator Pro Seqence Generator Pro  ·  PixInsight, Photoshop

Filters: Astrodon SII 3nm  ·  Astrodon OIII 3nm


Dates:April 4, 2021

Frames: 218x360"

Integration: 21.8 hours

Avg. Moon age: 22.23 days

Avg. Moon phase: 49.13%


Basic astrometry details

Astrometry.net job: 4375912

RA center: 7h 28' 49"

DEC center: +13° 18' 14"

Pixel scale: 0.778 arcsec/pixel

Orientation: 183.135 degrees

Field radius: 0.423 degrees


Resolution: 2900x2634

Data source: Mix of multiple source

Description

Me and Tudor Chibacu did a collaboration on this one. He shot 10 hours of Ha and 2 hours of RGB. I shot 5 hours of both O-III and S-II. This version is processed by me

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Sky plot

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Histogram

Abell 21 in SHO+RGB, 



    
        

            Erik Pirtala