Hemisphere:  Northern  ·  Constellation: Pisces (Psc)  ·  Contains:  NGC 467  ·  NGC 470  ·  NGC 474

Image of the day 12/12/2020

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    Arp 227, 



    
        

            Warren A. Keller
    Arp 227
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    Arp 227

    Image of the day 12/12/2020

    Getting plate-solving status, please wait...
      Arp 227, 



    
        

            Warren A. Keller
      Arp 227
      Powered byPixInsight

      Arp 227

      Technical card

      Basic astrometry details

      Astrometry.net job: 4049547

      RA center: 01h19m55s

      DEC center: +03°2436

      Pixel scale: 0.408 arcsec/pixel

      Orientation: 162.157 degrees

      Field radius: 0.322 degrees


      Resolution: 4024x4024

      Description

      Arp 227 in Pisces consists of NGC 470 and 474 at the center of the field. NGC 470, the smaller, colorful galaxy at left, is a classic, SB(r) spiral. The larger NGC 474 at right is a lenticular galaxy, but more interestingly, also a 'shell galaxy,' believed to be the result of a galactic merger. Note its subtle, concentric 'shells.' 474 is approximately 250,000 light-years across. Curiously, NGC 467 at upper-left, is also a shell galaxy, and appears to be interacting with the edge-on PGC 1249151 to its right. Other interesting PGC (Principal Galaxies Catalog) galaxies that appear in the field are 4755 and 4765 at 12 o'clock, and the lovely little face-on 1252050 at 4 o'clock. This data was acquired by SSRO in 2016. The image is a collaboration between myself and Mark Hanson.

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      Arp 227, 



    
        

            Warren A. Keller