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HD 55550


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Contribution to the study of composite spectra - IX. Spectroscopic orbital elements of 10 systems*
We present the results of a radial-velocity study of 10 spectroscopicbinaries with composite spectra that were observed at Observatoire deHaute-Provence with the CORAVEL instrument. Those systems, including acool, evolved, primary and a hot secondary of type B or A, were found tobe spectroscopic binaries. We computed their orbital elements for thefirst time. For three systems, the large mass function implies i~90°, with the possibility of eclipses. Mean angular separations arevery small (a<= 0.010 arcsec), which makes those systems resolvableonly with multi-pupil large interferometers.

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Observation and Astrometry data

Constellation:やまねこ座
Right ascension:07h15m38.29s
Declination:+46°04'13.2"
Apparent magnitude:8.908
Distance:418.41 parsecs
Proper motion RA:-5.2
Proper motion Dec:-17.4
B-T magnitude:9.457
V-T magnitude:8.954

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 55550
TYCHO-2 2000TYC 3392-525-1
USNO-A2.0USNO-A2 1350-07040085
HIPHIP 35116

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