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Object: Galaxy group M81, M82
Instrument: FFC 3.5/500
Camera: SBIG ST-8XME
Date: 2011/02/03
Location: St. Jean de Sault/France
Comments: selfguided on Vixen GP/DX mount
Exposure: LRGB (9,16 hrs): L = 51 x 300 s, R = 25 x 300 s, G = 17 x 300 s, B = 17 x 300 s, 1x1 binning, Astronomik RGB
Despite the relatively short exposure time of the luminance channel of "only" 4,25 hours, the integrated flux nebula is visible all over the image. A high contrast version of the luminance image is shown here

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