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Amateur Telescope Makers of Boston

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Submitted by Al Takeda on 11/21/2013 09:43:24

Comet C/2012 S1 (ISON) - November 15, 2013

Comet C/2012 S1 (ISON) was still rising early enough to clear the trees (approximately 7-degrees altitude) at the Clubhouse before astronomical twilight. Looking E-SE, I still had to contend with local light pollution on the horizon as well as partly cloudy conditions that morning. The comet was still a binocular object under the local sky at the Clubhouse.

5 images x 35-second subframes, Total= 2.9 minutes. Takahashi Epsilon -180, f/2.8 hyperbolic astrograph, Unmodified Canon T1i DSLR, Astronomik CLS Light Pollution filter, ISO 800, Losmandy Gemini G-11 EQ mount in comet tracking mode. Acquisition, calibration, alignment, combine and digital development processing by Images Plus 3.82b, Additional processing using Adobe Photoshop. ATMoB Clubhouse, Westford, MA, 15 November 2013.



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