Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)

Image of the day 10/12/2017

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    HDW2 (Sharpless 2-200) "Bearclaw" nebula, 



    
        

            snakagawa
    HDW2 (Sharpless 2-200) "Bearclaw" nebula
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    HDW2 (Sharpless 2-200) "Bearclaw" nebula

    Image of the day 10/12/2017

    Getting plate-solving status, please wait...
      HDW2 (Sharpless 2-200) "Bearclaw" nebula, 



    
        

            snakagawa
      HDW2 (Sharpless 2-200) "Bearclaw" nebula
      Powered byPixInsight

      HDW2 (Sharpless 2-200) "Bearclaw" nebula

      Technical card


      Basic astrometry details

      Astrometry.net job: 1753672

      RA center: 3h 10' 45"

      DEC center: +62° 49' 12"

      Pixel scale: 2.200 arcsec/pixel

      Orientation: 0.375 degrees

      Field radius: 1.076 degrees


      Resolution: 2751x2201

      Description

      HDW2 (Hartl-Dengl-Weinberger 2; )is a large and faint, ancient planetary nebula in Cassiopeia. It is located very close to another large faint and ancient PN HFG1. I do not know any common name for this nebula, so I'd call it the "Bearclaw nebula" from its surface texture. The center part is rich in Oiii (and some Ha), and the surrounding halo in Ha. There is little Sii in this target.
      C8+ Hyperstar 3 with an aperture mask (stopped down to F/3). Atik 460ex mono. Astrodon 5nm filters. Exposure info is as follows:
      Ha: 10 min x 65
      Oiii: 10 min x 46
      Sii: 10 min x 19

      Granview Campground, INYO California. Shot over 3 nights in very good seeing. Transparency was (as usual) good to above average.

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      HDW2 (Sharpless 2-200) "Bearclaw" nebula, 



    
        

            snakagawa