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HD 163508


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Nineteen new spectroscopic binaries and the rate of binary stars among F-M supergiants
Nineteen spectroscopic binaries (SBs) have been discovered in radialvelocity measurements made with the CORAVEL spectrophotometer on 181northern F-M supergiants. The rate of detected SBs among northern F-Msupergiants is 21 percent, without any dependence on spectral orluminosity class. The study of the binary F-M supergiants with knownorbital elements indicates that all the systems with a period smallerthan the critical value P(circ) have a nearly circular orbit. The valueof P(circ) depends on the luminosity class, being 400-600 d for class Iband 2000-7000 d for class Ia. This circularization of the orbits may bedue to the transfer of angular momentum during the phase of binary massexchange.

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Observation and Astrometry data

Constellation:Schlangenträger
Right ascension:17h56m13.59s
Declination:+07°30'35.6"
Apparent magnitude:10.321
Proper motion RA:14.7
Proper motion Dec:10.8
B-T magnitude:10.859
V-T magnitude:10.366

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 163508
TYCHO-2 2000TYC 1007-1531-1
USNO-A2.0USNO-A2 0975-10017796

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