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M-57 (Ring Nebula in Lyra)

        This color image was collected by Cathy Hooper at the Principia Telescope on August 12, 1999 (UT).   The image was built by software using contributions from exposures in the red:green:blue ranges in proportions to bring out the most realistic color.  Each exposure was taken through the colored filter and lasted one minute.  A Santa Barbara Instrument Group ST-6 camera took the images and an ST-4 performed telescope autoguiding throughout.

 

 
This site last edited: 08/24/04