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Contains:  NGC 467, NGC 470, NGC 474
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Shell galaxy NGC 474 (Arp 227), 



    
        

            sky-watcher (johny)
Shell galaxy NGC 474 (Arp 227)
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Shell galaxy NGC 474 (Arp 227)

Technical card


Dates:Oct. 22, 2019Oct. 24, 2019

Frames:
240x60" (gain: 50.00) 5C bin 1x1
40x180" -20C

Integration: 6.0 hours

Darks: ~20

Flats: ~30

Avg. Moon age: 24.28 days

Avg. Moon phase: 28.71%

Bortle Dark-Sky Scale: 4.00


Basic astrometry details

Astrometry.net job: 3008344

RA center: 1h 19' 40"

DEC center: +3° 22' 33"

Pixel scale: 1.120 arcsec/pixel

Orientation: 359.993 degrees

Field radius: 0.314 degrees


Resolution: 1600x1226

Locations: Western Hungary, Páli, Hungary

Data source: Backyard

Description

NGC 474 is a post-merger galaxy and a shell galaxy at the southern edge of the constellation Pisces, on the border to the whale. Together with NGC 470 it forms a loose galaxy pair. Probably, interactions between these two galaxies have caused the unusually complex structure of NGC 474 . The galaxy is the central object of the galaxy group Arp 227.

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sky-watcher
sky-watcher (johny)
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Shell galaxy NGC 474 (Arp 227), 



    
        

            sky-watcher (johny)