Combination of 15, 1 minute images unfiltered. SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
NGC 2129 is a bright, though fairly small and compact cluster of stars in Gemini, surrounding a 7th magnitude star. At a distance of over 1400 lightyears, this star, the B-type supergiant SAO 77842, is most likely a member of the cluster.