Hemisphere:  Northern  ·  Constellation: Pegasus (Peg)  ·  Contains:  NGC 7317  ·  NGC 7318  ·  NGC 7319  ·  NGC 7320  ·  NGC7317  ·  NGC7318  ·  NGC7319  ·  NGC7320  ·  Stephan's Quintet
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Stephan's Quintet, 



    
        

            Ruben Barbosa
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Stephan's Quintet

Getting plate-solving status, please wait...
Stephan's Quintet, 



    
        

            Ruben Barbosa
Powered byPixInsight

Stephan's Quintet

Technical card

Imaging telescopes or lenses: The Liverpool Telescope

Imaging cameras: IO:O

Software: Maxim DL, Gimp


Frames:Sloan g': 11x100" (18' 20")

Integration: 18' 20"


Astrometry.net job: 3247257

RA center: 22h 36' 2"

DEC center: +33° 57' 48"

Pixel scale: 0.304 arcsec/pixel

Orientation: 179.997 degrees

Field radius: 0.116 degrees


Resolution: 1992x1904

Description

* Image acquisition by Liverpool Telescope (luminance, build with sdss-g filtered) and C. Barbosa (RGB).
* Processing: Ruben Barbosa.
* See also: NGC 7331.

Stephan's Quintet is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered.

The brightest member of the visual grouping is NGC 7320 that is shown to have extensive H II regions, identified as red blobs, where active star formation is occurring.
Four of the five galaxies in Stephan's Quintet form a physical association, Hickson Compact Group 92, and will likely merge with each other. Radio observations in the early 1970s revealed a mysterious filament of emission which lies in inter-galactic space between the galaxies in the group. This same region is also detected in the faint glow of ionized atomic hydrogen seen in the visible part of the spectrum as a green arc.

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Sky plot

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Histogram

Stephan's Quintet, 



    
        

            Ruben Barbosa