NGC 6720 (M57) Lyr 2.5

August 10, 2002

Each of the red, green, and blue images is a combination of 4 images, each of 480 seconds The images were taken with a Pictor 1616 with a Pictor 616 filter wheel attached to an Meade 10" F/6.772 telescope. A Pictor 201XT was attached to an ETX for guiding. Meade Red, Green, and Blue filters were used. Each of the images was corrected with a dark frame and a flat field.

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Last updated: August 11, 2002