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HD 21756


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Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS
Radial velocities have been determined for a sample of 2930 B2-F5 stars,95% observed by the Hipparcos satellite in the north hemisphere and 80%without reliable radial velocity up to now. Observations were obtainedat the Observatoire de Haute Provence with a dispersion of 80Ä,mm(-1) with the aim of studying stellar and galactic dynamics.Radial velocities have been measured by correlation with templates ofthe same spectral class. The mean obtained precision is 3.0 km s(-1)with three observations. A new MK spectral classification is estimatedfor all stars. Based on observations made at the Haute ProvenceObservatory, France and on data from The Hipparcos Catalogue, ESA.Tables 4, 5 and 6 are only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr or viahttp://cdsweb.u-strasbg.fr/Abstract.htm

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Osservazione e dati astrometrici

Costellazione:Toro
Ascensione retta:03h30m34.36s
Declinazione:+02°04'46.7"
Magnitudine apparente:8.986
Distanza:201.207 parsec
Moto proprio RA:-0.3
Moto proprio Dec:-59.4
B-T magnitude:9.525
V-T magnitude:9.031

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 21756
TYCHO-2 2000TYC 64-330-1
USNO-A2.0USNO-A2 0900-00806855
HIPHIP 16334

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