Messier 39 - Open Cluster in Cygnus
Open Cluster Messier 39
  • Description: Open cluster Messier 39 in Cygnus, also known as NGC7092. Only 30 stars in M39 but they are bright and stand out well against the background Milky Way. Magnitude 4.6 covering 31 arc minutes so a nice binocular target too. Note - diffraction spikes on the cluster stars are created by running two pieces of black thread across the telescope lens.
  • Camera: SBIG ST-8XE at -15C
  • Filters: Standard SBIG RGB set
  • Scope: Takahashi FSQ-106N
  • Exposure: 3x5 R, 3x5 G, 3x6 B
  • Location: near Cayley, Alberta
  • Date: September 1, 2006
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