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      Featured wallpaper
      Wallpaper author:
      Antoine Grelin

      15 Jul 2026

      Double Cluster in Perseus with HA (NGC 869 and NGC 884)

      The Double Cluster in Perseus in RGB+HA to show the rich Hydrogen Alpha background.

      Dataset author
      Antoine Grelin
      T-31

      Other wallpapers

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      • Type of target
        ............................................................................................................................
        Globular Cluster
      • Camera
        ............................................................................................................................
        QHY600M
      • Target coordinates
        ............................................................................................................................
        RA 02 18 57.8 Dec 57 08 02
      • Hemisphere
        ............................................................................................................................
        Northern
      • Telescope location
        ............................................................................................................................
        United States of America
      • Celestial objects
        ............................................................................................................................
        NGC 869, NGC 884
      • Transient event
        ............................................................................................................................
        No
      • Observed on
        ............................................................................................................................
        31 Oct 2022 - 29 Nov 2022
      Filter
      Avg Exp (s)
      Total Exposure
      Subframes
      Red6050m50
      Green6049m49
      Blue6050m50
      Halpha60018h40m112

      Double Cluster in Perseus with HA (NGC 869 and NGC 884)