The young open cluster Ruprecht 55

Details The young open cluster Ruprecht 55 The young open cluster Ruprecht 55

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.193..895d&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 193, Dec. 1980, p. 895-900.

Astronomy and Astrophysics

Astronomy

4

Astronomical Photometry, Open Clusters, Stellar Spectrophotometry, Ubv Spectra, Astronomical Photography, B Stars, Electrophotometry, O Stars, Stellar Magnitude

Scientific paper

UBV photographic photometry of 404 stars, to a limiting magnitude of V = 17.2 is used to investigate the young open cluster Ruprecht 55. A distance of 5 kpc with a foreground B-V color excess of 0.58 mag and an age of less than 10 billion years is estimated for the cluster. Star counts using the Cosmos measuring machine confirm the lack of central condensation of this cluster and it is suggested that Ruprecht 55 may be part of a more extensive association of OB stars.

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