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Subject: M4
Author: Peter Vasey
Scope: WO ZenithStar 66 SD Doublet
Instruments: Artemis 285 camera
Exposure time: Luminance 14 x 2 minutes, RGB each 5 x 2 minutes.
Place & Seeing: La Palma
Date: 2007/06
Remarks: The sky was so clear and contrasty that just short one or two minute exposures brought out fine detail and nebulosity.

 

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