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HD 161658


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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

UVBY photometry of wide visual double stars with B, A and F spectral type- I.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978A&AS...34..453O&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Ercole
Ascensione retta:17h45m54.77s
Declinazione:+21°53'17.4"
Magnitudine apparente:8.29
Distanza:236.967 parsec
Moto proprio RA:-8.6
Moto proprio Dec:6.4
B-T magnitude:8.465
V-T magnitude:8.305

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 161658
TYCHO-2 2000TYC 1564-3983-1
USNO-A2.0USNO-A2 1050-09119836
HIPHIP 86941

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