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HD 123720


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Radial Velocity Studies of Southern Close Binary Stars. I. Winter Systems
Radial velocity measurements and sine-curve fits to the orbital velocityvariations are presented for nine contact binaries: V1464 Aql, V759 Cen,DE Oct, MW Pav, BQ Phe, EL Aqr, SX Crv, VZ Lib, and GR Vir. For thefirst five of these, our observations are the first available radialvelocity data. For the three remaining radial velocity variables, CE Hyiis a known visual binary, while CL Cet and V1084 Sco are suspected to bemultiple systems in which the contact binary is spectrally dominated byits companion (which itself is a binary in V1084 Sco). Five additionalvariable stars, V872 Ara, BD Cap, HIP 69300, BX Ind, and V388 Pav, areof unknown type, but most are pulsating stars; we give their mean radialvelocities and Vsini.Based on data obtained at the European Southern Observatory.

True and Possible Contact Binaries in the Hipparcos Catalogue
A comprehensive list of contact binaries included in the HIPPARCOScatalogue is given.

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观测天体数据

星座:半人馬座
右阿森松:14h11m02.78s
赤纬:-55°26'51.7"
视星:7.758
距离:170.648 天文距离
右阿森松适当运动:-15.6
赤纬适当运动:-9.9
B-T magnitude:8.032
V-T magnitude:7.781

目录:
适当名称   (Edit)
HD 1989HD 123720
TYCHO-2 2000TYC 8669-2924-1
USNO-A2.0USNO-A2 0300-20573664
HIPHIP 69300

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