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

Equipment

Imaging Telescopes Or Lenses
GSO 6" f/4 Imaging Newtonian Telescope
Imaging Cameras
ASI1600MM-C
Mounts
SkyWatcher EQ-6 Pro, SkyWatcher EQ-6 Pro
Filters
Astrodon SII 3nm · Astrodon OIII 3nm
Accessories
Sky-watcher f/4 Aplnatic coma corrector
Software
Sequence Generator Pro Seqence Generator Pro · PixInsight, Photoshop

Acquisition details

Dates:
April 4, 2021
Frames:
218x360" (21h 48')
Integration:
21h 48'
Avg. Moon age:
22.23 days
Avg. Moon phase:
49.13%

Basic astrometry details

Astrometry.net job: 4375912

RA center: 07h28m49s.9

DEC center: +13°1814

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

Comments

Sky plot

Sky plot

Histogram

Abell 21 in SHO+RGB, 



    
        

            Erik Pirtala