Omega Centauri
Photographed by Scott Davis on June 7, 2013
From Courtright Reservoir, CA
 
Description:
Omega Centauri, also known as NGC5139 or Caldwell 80, is an extremely large globular cluster in the constellation Centaurus, located at a distance of approximately 15,800 light years. Due to its density, it is very difficult to estimate the number of stars, but the number is well into the millions. From Courtright Reservoir, at a latitude of 37° 4' 53.6196" North, the cluster is barely high enough to be photographed without capturing part of the landscape as well (though some frames were eliminated because they had trees in them). Poor seeing prevented the stars in the cluster from being in better focus.
 
Imaging Camera:
Canon EOS 60D
 
Imaging Scope/Lens:
Orion Astrograph 8" f/3.9 Newtonian
 
Mount/Tripod:
Celestron CGEM (Hypertuned)
 
Guide Scope/Camera:
Orion Shorttube 80mm w/ Starshoot Autoguider
 
Exposure Details:
Camera settings were ISO 1600 with 3-minute exposures. A total of 29 lights, 10 darks, and 50 each of flats, dark flats, and bias frames were stacked to create this final image. Processed in Photoshop CS6 using Scott Rosen's DSLR LLRGB processing method.

 
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