This image is a combination of 3 layers. Layer 1 9- images each with an exposure of 300 seconds through a RED filter. Layer 2 9- images each with an exposure of 300 seconds through a GREEN filter. Layer 3 9- images each with an exposure of 300 seconds through a BLUE filter. This used 2x2 binning. The images were taken with a SBIG STT-8300 3 CCD attached to a Centurion 18" F/2.8
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