Celestial hemisphere:  Southern  ·  Constellation: Hydra (Hya)  ·  Contains:  PK238+34.1
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Abell 33, 



    
        

            Gary Imm
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Abell 33

Getting plate-solving status, please wait...
Abell 33, 



    
        

            Gary Imm
Powered byPixInsight

Abell 33

Acquisition details

Dates:
March 2, 2017
Frames:
Astrodon H-alpha 5nm: 14×300(1h 10′) (gain: 139.00) -20°C bin 1×1
Astrodon OIII 3nm: 13×300(1h 5′) (gain: 139.00) -20°C bin 1×1
Astrodon SII 5nm: 12×300(1h) (gain: 139.00) -20°C bin 1×1
Integration:
3h 15′
Avg. Moon age:
4.15 days
Avg. Moon phase:
18.27%

RA center: 09h39m09s.667

DEC center: -02°4844.29

Pixel scale: 0.853 arcsec/pixel

Orientation: -138.245 degrees

Field radius: 0.400 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 2944x1656

File size: 248.9 KB

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard

Description

There are two unique aspects of this sky object - the almost perfectly symmetric circular nebula, and the star in the background which is not part of the nebula but which is perfectly positioned relative to our visual perspective from earth. Together, the nebula and the star create a sparkling diamond ring. This is a planetary nebula which was created when a dying star blew off its outer layers and formed into a nebula. The remnant of the dying star, on its way to becoming a white dwarf, can be seen just slightly off-center inside the nebula, visible as a tiny white pearl. It is still brighter than our Sun and emits enough radiation to make the bubble of expelled atmosphere glow.

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