Image of the day 12/25/2013

    Winter White Dwarfs, 



    
        

            Giuseppe Donatiello

    Winter White Dwarfs

    Image of the day 12/25/2013

      Winter White Dwarfs, 



    
        

            Giuseppe Donatiello

      Winter White Dwarfs

      Equipment

      Imaging Telescopes Or Lenses
      127 ED doublet f/9 (homemade)
      Imaging Cameras
      Homemade MaxCam 1280x1048 PDS
      Mounts
      Synta EQ5
      Software
      Star Tools · RegiStax · Corel Paint Shop Pro x2 · Emil Kraaikamp's AutoStakkert!

      Acquisition details

      Dates:
      Dec. 20, 2013
      Frames:
      Integration:
      0
      Avg. Moon age:
      17.55 days
      Avg. Moon phase:
      91.51%

      Basic astrometry details

      Astrometry.net job: 143976

      Resolution: 3738x2394

      Locations: Home site, Oria, Brindisi, Italy

      Data source: Backyard

      Description

      From left to right in order of increasing difficulty.

      40 Eridani (also known as Omicron2 Eridani, or Keid) is a triple star system less than 16.5 light years away from Earth. It is in the constellation Eridanus. The pair 40 Eridani B/C was discovered on January 31, 1783, by William Herschel. In 1910, it was discovered that although component B was a faint star, it was white in color, in fact it was the first discovered white dwarf.

      Sirius A and a faint white dwarf companion of spectral type DA2, called Sirius B. The distance separating Sirius A from its companion varies between 8.1 and 31.5 AU.

      Procyon A and a faint white dwarf companion of spectral type DQZ named Procyon B.

      Comments

      Histogram

      Winter White Dwarfs, 



    
        

            Giuseppe Donatiello