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UvbyHbeta_ photometry of main sequence A type stars.
We present Stroemgren uvby and Hbeta_ photometry for a set of575 northern main sequence A type stars, most of them belonging to theHipparcos Input Catalogue, with V from 5mag to 10mag and with knownradial velocities. These observations enlarge the catalogue we began tocompile some years ago to more than 1500 stars. Our catalogue includeskinematic and astrophysical data for each star. Our future goal is toperform an accurate analysis of the kinematical behaviour of these starsin the solar neighbourhood.

Radial velocity measurements. II - Ground-based observations of the program stars for the HIPPARCOS satellite
New radial velocities for 446 stars of magnitude 9.0 or brighter in 1616-sq-deg fields of the Northern Hemisphere are determined by automaticPDS measurement of 80-A/mm-dispersion spectra obtained at theObservatoire de Haute Provence using a 17-cm-diameter objective prism.The fields were selected to provide data for the input catalog of theESA Hipparcos astrometric satellite. The measurement techniques andprecision are discussed, and the results are presented in extensivetables and graphs.

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Dades d'Observació i Astrometria

Constel·lació:Lacerta
Ascensió Recta:22h31m31.62s
Declinació:+42°13'17.9"
Magnitud Aparent:7.941
Distancia:166.945 parsecs
Moviment propi RA:-15.9
Moviment propi Dec:-35.7
B-T magnitude:8.171
V-T magnitude:7.96

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 213544
TYCHO-2 2000TYC 3209-2087-1
USNO-A2.0USNO-A2 1275-17600641
HIPHIP 111189

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