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HD 173056


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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

Radial velocity measurements. IV - Ground-based accompaniment to the HIPPARCOS observation program
The paper presents 396 radial velocities of stars distributed in 19fields of 4 x 4 degrees. The study employs the Fehrenbach objectiveprism method and the same measuring technique used in a previous paper(Fehrenbach et al., 1987).

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Osservazione e dati astrometrici

Costellazione:Ofiuco
Ascensione retta:18h43m05.98s
Declinazione:+07°16'26.6"
Magnitudine apparente:8.245
Distanza:347.222 parsec
Moto proprio RA:-5.2
Moto proprio Dec:-5.4
B-T magnitude:8.398
V-T magnitude:8.258

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 173056
TYCHO-2 2000TYC 459-386-1
USNO-A2.0USNO-A2 0900-13515077
HIPHIP 91803

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