UBV photometry of open clusters in the Cassiopeia region. I - Photoelectric observations of NGC436 and 637

Details UBV photometry of open clusters in the Cassiopeia region. I - Photoelectric observations of NGC436 and 637 UBV photometry of open clusters in the Cassiopeia region. I - Photoelectric observations of NGC436 and 637

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...87..153h&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 87, no. 1, Jan. 1991, p. 153-158.

Astronomy and Astrophysics

Astrophysics

11

Astronomical Photometry, Cassiopeia Constellation, Electrophotometry, Open Clusters, Ubv Spectra, Galactic Structure, Radial Velocity, Spiral Galaxies, Open Cluster, Ubv Photometry

Scientific paper

Photoelectric UBV observations of 34 and 27 stars in NGC 436 and 637, two open clusters not yet studied in this system, have been obtained. NGC 436 (m-M = 13.60,E(B-V) = 0.48, log t = 6.3 × 107yr) appears similar in age to the Alpha Persei cluster, while NGC 637 (m-M = 14.10,E(B-V) = 0.66,log t = 1.5 × 107yr) is similar to NGC 884. The respective distances (2600 pc and 2500 pc) locate both clusters within the Cassiopeia-Perseus spiral arm.

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