M57 from Chabot

by Bill Drelling

Friday night I had the opportunity to use the 20" refractor up at Chabot after the public viewing ended. We just had a few minutes before securng the scope, so I put my Meade DSI Pro on it and took a few minutes of data on M57. Each exposure was only 30 seconds and unguided, but I wanted to see what the camera could do on a refractor with a focal length of 8500 mm. Each color channel (red, green, and blue) is composed about 5 images of 30 seconds duration each. It is a bit noisy, but here it is:

http://gatorchaser.net/images/chabotm57rgb2.jpg

Bill Drelling

Observing Reports Observing Sites GSSP 2010, July 10 - 14
Frosty Acres Ranch
Adin, CA

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