Caph and NGC7789 in Cassiopeia

  • Telescope: Canon EF 135mm f/2L USM telephoto lens (f/2.8 stopped)
  • Camera: Baader modified Canon 400D, 800 iso, RAW mode
  • Mount: Astrotrac with polar scope
  • Integration: 30 x 120 sec, (21 bias, 21 dark, 21 flat)
  • Date, Location, Temp/Software: August 2012, Grosseto (Italy), 21°C/MaxIm-DL, PixInsight, PhotoShop
  • Click HERE for solved map
  • Click the image for 1920×1080 resolution

Caph and NGC 7789.  Caph (bottom center), designated Beta Cassiopeiae, is a white-hued star of magnitude 2.3, 54 light-years from Earth.  NGC 7789 (above right) is an open or galactic star cluster about 8,000 light-years distant toward the constellation Cassiopeia and lies near the plane of our Milky Way galaxy. All the stars in the cluster were likely born at the same time but the brighter and more massive ones have more rapidly exhausted the hydrogen fuel in their cores. There are also many fairly bright nebula on this image.

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