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      Featured wallpaper
      Wallpaper author:
      Mark Johnston

      26 Nov 2025

      Large prominence with spicules Nov 25 2025

      Large prominence with spicules on the limb of the Sun. Used my solar spectrum 0.3A single stack etalon to freeze the seeing with faster exposures (3 mSec). Seeing 4/5

      Dataset author
      Mark Johnston
      T-22

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      • Type of target
        ............................................................................................................................
        Sun
      • Camera
        ............................................................................................................................
        Player One Apollo-M IMX174M with cooler
      • Target coordinates
        ............................................................................................................................
        RA 00 00 00.0 Dec 00 00 00
      • Hemisphere
        ............................................................................................................................
        Northern
      • Telescope location
        ............................................................................................................................
        United States of America
      • Transient event
        ............................................................................................................................
        Yes
      • Observed on
        ............................................................................................................................
        25 Nov 2025 - 25 Nov 2025
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      Halpha1803m1

      Large prominence with spicules Nov 25 2025