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HD 187220


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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:Aquila
Ascensione retta:19h48m28.10s
Declinazione:+12°23'16.8"
Magnitudine apparente:7.746
Distanza:369.004 parsec
Moto proprio RA:5.6
Moto proprio Dec:1.4
B-T magnitude:7.776
V-T magnitude:7.749

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 187220
TYCHO-2 2000TYC 1066-303-1
USNO-A2.0USNO-A2 0975-16577546
HIPHIP 97451

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