Albireo (Beta Cygni) is considered to be one of the most beautiful double stars in the sky. It is the visible star at the foot of the Northern Cross in the constellation Cygnus, but actually consists of a pair of stars, one golden yellow (mag. 3.09) and one sapphire blue (mag. 5.11). Albireo is believed to be a physical pair (gravitationally bound). This image is combined from 0.1-sec exposures filtered through red, green, and blue filters. 20 subexposures through each filter using a WO FLT110 4.3" f/7 refractor and an SXV-H9 CCD camera on 27 July 2008 were combined to create this RGB composite.
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