The Membership and Distance of the Open Cluster Collinder 419
CALIFORNIA INST OF TECHNOLOGY PASADENA JET PROPULSION LAB
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The young open cluster Collinder 419 surrounds the massive O star, HD 193322, that is itself a remarkable multiple star system containing at least four components. Here we present a discussion of the cluster distance based upon new spectral classifications of the brighter members, UBV photometry, and an analysis of astrometric and photometric data from the third U. S. Naval Observatory CCD Astrograph Catalog and Two Micron All Sky Survey Catalog. We determine an average cluster reddening of EB - V 0.37 -.05 mag and a cluster distance of 74136 pc. The cluster probably contains some very young stars that may include a reddened M3 III star, IRAS 201614035.