Hemisphere:  Northern  ·  Constellation: Aries (Ari)  ·  Contains:  NGC 770  ·  NGC 772

Image of the day 12/24/2017

Getting plate-solving status, please wait...
    NGC772, 



    
        

            tommy_nawratil
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    NGC772

    Image of the day 12/24/2017

    Getting plate-solving status, please wait...
      NGC772, 



    
        

            tommy_nawratil
      Powered byPixInsight

      NGC772

      Imaging Telescopes Or Lenses
      10" f/4 (Lacerta Photonewton)
      Imaging Cameras
      ZWO ASI1600MM-Cool
      Mounts
      AZ-EQ6
      Filters
      Astronomik LRGB 31mm
      Accessories
      Skywatcher/Lacerta GPU comacorrector
      Software
      Photoshop · Pleiades Astrophoto, S.L. Pix Insight · APT - Astro Photography Tool APT 3.13
      Guiding Telescopes Or Lenses
      Skywatcher 9x50 finder
      Guiding Cameras
      MGEN

      Acquisition details

      Dates:
      Sept. 28, 2017
      Frames:
      85x180" (4h 15')
      Integration:
      4h 15'
      Avg. Moon age:
      7.72 days
      Avg. Moon phase:
      53.60%

      RA center: 01h59m19s.35

      DEC center: +18°5947.5

      Pixel scale: 1.179 arcsec/pixel

      Orientation: -88.985 degrees

      Field radius: 0.220 degrees

      More info:Open 

      Resolution: 1075x806

      Locations: my lovely garden, near Vienna, Austria

      Data source: Traveller

      Description

      NGC772 in Aries takes almost 6 pages in Annals of the Deep Sky Vol.2 so there is a lot to say about it. Discovered by John Herschel in 1785 it later became Nr. 78 in Halton Arp's catalogue of peculiar galaxies. And peculiar it is. Tidal streams seem to connect to a line of neighbour galaxies, but some of the individual redshifts are very different from NGC772. The only true companion is NGC770, the spheroidal galaxy with the thicker star stream beneath. Interaction with it is also considered to be the probable cause of the disturbance so pronounced visible in NGC772.

      LRGB of 56+11+8+10 x 3min subframes, Lacerta 10" f/4 photonewton with ASI1600MMC

      Comments

      Revisions

        NGC772, 



    
        

            tommy_nawratil
        Original
        NGC772, 



    
        

            tommy_nawratil
        B
      • Final
        NGC772, 



    
        

            tommy_nawratil
        C

      B

      Description: annotated version

      Uploaded: ...

      C

      Description: center crop

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      Sky plot

      Sky plot

      Histogram

      NGC772, 



    
        

            tommy_nawratil