M45 – Pleiades (LRGB)

M45 – Pleiades

M45, the Pleiades, is an open star cluster in the constellation Taurus about 444 light years away containing middle-aged, hot blue stars. The nebulosity surrounding the cluster is an unrelated interstellar cloud through which it is currently passing, reflecting the blue light from the dominant stars in the cluster. Gravitational interactions will disperse the stars in the cluster in about 250 million years.

  • Date – 21 December 2019
  • Location – Backyard
  • Telescope – SV70T @ f/4.8 (336mm focal length)
  • Camera – ASI1600MM-C @ -10C
  • Guiding – ASI120MM-Mini / ZWO OAG
  • Mount – Orion Atlas Pro AZ/EQ-G
  • Pixel Scale – 2.30″/pixel
  • Exposures (Gain 76, Offset 50)
    • Lum: 59x60s
    • Red: 20x180s
    • Green: 20x180s
    • Blue: 20x180s
    • Total integration: 4 hours
  • Processing – PixInsight


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