Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.318.1023k&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 318, Issue 4, pp. 1023-1035.
Astronomy and Astrophysics
Astronomy
8
Stars: Distances, Stars: Early-Type, Stars: Fundamental Parameters, Open Clusters And Associations: Individual: Cr 121
Scientific paper
The distribution of bright B-type stars in a field with a radius of 5° centred at the Galactic open cluster Cr 121 is studied utilizing Strömgren and Hβ photometry. All PPM stars earlier than spectral type A0 are used, revealing a loose nearby structure at a distance of 660-730pc, and a compact more distant group, which appears to be a genuine cluster: Cr 121. Based on similar coordinates, distances and positions on the colour-magnitude (CM) and Hertzsprung-Russell (HR) diagrams, 11 photometric cluster members are selected at a mean distance of 1085(+/-41 standard error) pc. The results are discussed in the light of both classical and Hipparcos points of view.
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