The Double Cluster

These two open star clusters in the constellation Perseus are over 7,000  light years from here.  They contain both red and blue supergiant stars.  The clusters are visible through binoculars in this star rich area of the Milky Way Galaxy.

Date: February 22, 2006
Location: Cupertino, CA
Scope: Takahashi FS102 @ 600mm
Guiding: Vixen 60mm refractor with SBIG ST-4
Mount: Losmandy G-11
Camera: SBIG ST2000XM
Filters: Custom Scientific in FLI CFW
Exposure details:
  Red filter 16 minutes
  Green filter 8 minutes
  Blue filter 8 minutes
Processing: MaximDL for calibration, alignment and combining.  
PSCS for final processing