New Color Magnitude Diagrams for NGC 637 and NGC 7245

Details New Color Magnitude Diagrams for NGC 637 and NGC 7245 New Color Magnitude Diagrams for NGC 637 and NGC 7245

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.7202p&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #72.02; Bulletin of the American Astronomical Society, Vol. 24, p.1235

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We present new color-magnitude diagrams for the open clusters NGC 637 and NCG 7245. CCD images were taken in the UBVR system for NGC 637 and in the BVR system for NGC 7245 at the Lowell Observatory 42-inch telescope. The distance modulus and the age are determined for both clusters; the color excess for NGC 637 is derived. NGC 7245 has not previously been measured in the BVR system, and neither cluster has been analyzed photometrically with a CCD. The improved accuracy of photometric measurement of CCD images over photographic methods gives increased accuracy for the age and distance.

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