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M15 September 02-03


darditti

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This is the result of two nights work with a C-14 on M15, one of the greatest of the northern globulars. (Incidentally, I am surprised how unpopular the globs are with the imagers here - you see so few).

The luminance was taken with a CLS filter, and was 15x3 min exposures taken on the 2nd in quite a good sky. The colours were R (7x5 min) G (6x5 min) B (9x5 min) taken on the 3rd in a poor sky with some cloud. 155 mins total exposure. Numerous flats and darks were also taken. The camera was an Artemis 285 used unbinned, and the C-14 was used with a Meade reducer taking it down to f7. Radial guiding was done with a DMK camera. Taken from London.

David

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