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HD 31881


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Mesures de vitesses radiales. VII. Accompagnement AU sol DU programme d'observation DU satellite Hipparcos. Radial velocities. VII. Ground based measurements for Hipparcos.
We publish 734 radial velocities of stars distributed in 28 fields of4x4deg. We continue the PPO series (Fehrenbach et al. 1987; Duflot etal. 1990 and 1992), using the Fehrenbach objective prism method.

UBV photometry of stars whose positions are accurately known.
Photometric indices V, B-V, and U-B were measured for about 560 stars ofthe AGK3R and NPZT catalogs between BD declinations 11 deg and 23 deg,using the 40-cm Cassegrain telescope of the Kvistaberg Observatory fromApril 1986 to May 1987. The observation procedure and the reductiontechnique were the same as in the earlier papers of this series by Oja(1984, 1985, 1986, and 1987). The mean errors were calculated from theinternal consistency of the data. The accuracy was found to be the sameas for the earlier parts of the survey.

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Osservazione e dati astrometrici

Costellazione:Toro
Ascensione retta:05h00m13.88s
Declinazione:+20°55'39.9"
Magnitudine apparente:8.262
Distanza:144.3 parsec
Moto proprio RA:-1.1
Moto proprio Dec:-10.5
B-T magnitude:8.445
V-T magnitude:8.278

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 31881
TYCHO-2 2000TYC 1293-2734-1
USNO-A2.0USNO-A2 1050-01574246
HIPHIP 23253
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