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1995PASP..107.1215T - Publ. Astron. Soc. Pac., 107, 1215-1225 (1995/December-0)
Composition and evolution patterns in the old open cluster Melotte 66: photoelectric (U)BV(RI) photometry of 71 stars.
TWAROG B.A., ANTHONY-TWAROG B.J. and HAWARDEN T.G.
Abstract (from CDS):
Previously published CCD uby data has been transformed to the BV system to permit an analysis of the cluster color-magnitude diagram with reference to isochrones which incorporate convective core overshoot. Main sequence fits imply an age of 4.5 ± 0.5 Gyr and an apparent modulus (m-M) = 13.75. Further support for these reddening and distance values is provided by comparison of the red giant clump to other old open clusters. The giant branch of Mel 66 is shown to extend to an extreme in both luminosity and color currently matched only by old open cluster NGC 6791 and Cr 261.
Abstract Copyright: ∼
Journal keyword(s):
CDS comments: table 1: objects format EN and NNNNN not in SIMBAD
Simbad objects: 66
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