Binary 15 Monocerotis and Star Cluster NGC 2264

Details Binary 15 Monocerotis and Star Cluster NGC 2264 Binary 15 Monocerotis and Star Cluster NGC 2264

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010pobeo..90...25c&link_type=abstract

Publications of the Astronomical Observatory of Belgrade, vol. 90, pp. 25-28

Astronomy and Astrophysics

Astronomy

Scientific paper

The orbit of 15 Mon (close pair CHR 168 Aa-Ab) was recently calculated on the basis of speckle measurements only. Four new measurements, performed after the orbit calculation, satisfy this orbit very well. The orbital elements and the mass values expected for the components, as well as their distance moduli, result in a distance of 15 Mon in a very good agreement with the distance to NGC 2264, but disagrees with the trigonometric distance of the binary. On the basis of the orbital elements and mass ratio the line-of-sight velocity of the binary mass centre is determined. It is found that the value of this velocity is within the limits expected for stars belonging to NGC 2264. Its difference from the expected mean in the field of NGC 2264 agrees well with the value mentioned in the literature.

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