Research Papers in Physics and Astronomy

 

Date of this Version

1977

Comments

Published in Publications of the Astronomical Society of the Pacific 89:546-549, August 1977. Copyright 1977 Astronomical Society of the Pacific. Used by permission.

Abstract

Four-color and Hβ photometry has been obtained of stars in the galactic clusters NGC 7654 and M25. An analysis of these data shows variable extinction in both clusters. The distance modnlus of NGC 7654 is found to be 10m.99 ± 0.2 and that of M25 is 8m.68 ± 0.1.

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