M67 RGB – Open Cluster

Messier 67 (also known as M67 or NGC 2682) is an open cluster  in the southern, equatorial half of Cancer. Estimates of its age range between 3.2 and 5 billion years. Distance estimates are likewise varied and typically are 800–900 parsecs (2,600–2,900 ly). 

It is not the oldest known open cluster, but clusters known to be older tied to the Milky Way are few, and none of those is closer.

M67 is one of the most studied open clusters, yet estimates of its physical parameters such as age, mass, and number of stars of a given type, vary substantially. It has been extimated its age to be 4 billion years, its mass to be 1080 solar masses.

It has more than 100 stars similar to the Sun, and numerous red giants. The total star count has been estimated at well over 500. The ages and prevalence of Sun-like stars had led some astronomers to theorize it as the possible parent cluster of the Sun. However, computer simulations have suggested that this is highly unlikely.

Technical data

  • Optics: Takahashi FSQ85ED
  • Camera: QSI 683 WSG-5
  • Mount: Sky-Watcher EQ-6 Pro
  • Filters: Astrodon Tru-Balance E-Series Gen 2 HaLRGB
  • Guiding system: Takahashi FSQ85ED, Lodestar Starlight Xpress
  • Accessories: USB_Focus v3 Robotic focuser
  • Acquisition: Voyager  ·  PS  ·  Pixinsight 1.8 . PHD2
  • Post-processing: Pixinsight – PS5
  • Dates: 201-01-18
  • Exposure details: R-G-B ->(19×5):(17×5:(18×5)All Bin1 [num x minutes]
  • Bias/Dark /Flat: 99-21-21
  • Cooling Details: -20°C
  • SQM-L: 21
  • Integration: 4h 30′
  • Location: Observatory