Hemisphere:  Northern  ·  Constellation: Perseus (Per)  ·  Contains:  B25  ·  LBN 742  ·  LBN 744  ·  LBN 755  ·  LDN 1444  ·  LDN 1465  ·  NGC 1605  ·  PK158+00.1  ·  Sh2-216

Image of the day 01/14/2022

Getting plate-solving status, please wait...
    Sh2-216 The largest and second closest PN, 



    
        

            Göran Nilsson
    Powered byPixInsight

    Sh2-216 The largest and second closest PN

    Image of the day 01/14/2022

    Getting plate-solving status, please wait...
      Sh2-216 The largest and second closest PN, 



    
        

            Göran Nilsson
      Powered byPixInsight

      Sh2-216 The largest and second closest PN

      Imaging Telescopes Or Lenses
      Celestron RASA 8" F/2
      Imaging Cameras
      ZWO ASI2600MC-Pro
      Mounts
      MESU OPTICS Mesu 200
      Filters
      Hutech IDAS 2" NBZ (dualband Oiii & Ha)
      Software
      Adobe Photoshop 2100 · PixInsight 01.08 Ripley
      Guiding Telescopes Or Lenses
      Sky-Watcher Evostar 72ED
      Guiding Cameras
      Starlight Xpress Lodestar Autoguider X2

      Acquisition details

      Dates:
      Jan. 4, 2022
      Frames:
      120x300" (10h)
      Integration:
      10h
      Avg. Moon age:
      1.98 days
      Avg. Moon phase:
      4.39%

      RA center: 04h43m41s.79

      DEC center: +46°2619.0

      Pixel scale: 3.413 arcsec/pixel

      Orientation: 0.752 degrees

      Field radius: 2.165 degrees

      WCS transformation: thin plate spline

      More info:Open 

      Resolution: 3770x2580

      Locations: Home Observatory, Hole, Värmland, Sweden

      Data source: Backyard

      Description

      In terms of angular size Sh2-216 is the largest planetary nebulae in the sky, being about 3x wider than the moon as seen from earth (although it is too faint to be seen). It is about 500 000 years old, explaining why it is so very large and very dim. Sh2-216 is also the second closest planetary nebula at a distance of 400 light years.

      LBN 755 (down to the left) was apparently missed by Sharpless in his catalogue, which is a bit surprising because there are three more Sharpless objects just to the left of this frame, as seen in my recent image: https://www.astrobin.com/pfyppk/

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      Sh2-216 The largest and second closest PN, 



    
        

            Göran Nilsson