NGC 7331

2013:11:21:00:22:09

This image is a combination of 4 layers. Layer 1 is Clear was an exposure of 300 seconds Layer 2 is Red is a combination of 6 images, each of 300 seconds. Layer 3 is Green is a combination of 6 images, each of 300 seconds. Layer 4 is Blue is a combination of 6 images, each of 300 seconds. Each of the images was corrected with a dark frame and a flat field. The images taken with a SBIG STT-8300 3 CCD Camera attached to an telescope.


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Last updated: February 22, 2015