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Collinder 110: an Old Open Cluster in Monoceros
Results of photoelectric UBVRI photometry of 78 stars and photographicPDS and CCD photometry for 437 stars are presented for Collinder 110, anold open cluster at low Galactic latitude. Proper motions obtained fromLick Sky Survey plates were used to identify 39 stars as foregroundobjects. The cluster's reddening, distance, and age are estimated as E(B- V) = 0.50 +/- 0.03 mag, r = 1950 +/- 300 pc, and t = 1.4 +/- 0.3 Gyr,assuming a solar metal abundance.
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