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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. V - Ground support of the HIPPARCOS satellite observation program
The paper presents data on 1070 radial velocity measurements of starsdistributed in 39 fields measuring 4 deg x 4 deg. The PPO series ofFehrenbach et al. (1987) and Duflot et al. (1990) is continued using theFehrenbach objective prism method.

Über die Veränderlichkeit der Sterne des Spektraltyps A
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Dades d'Observació i Astrometria

Constel·lació:Hercules
Ascensió Recta:18h09m52.71s
Declinació:+39°52'59.3"
Magnitud Aparent:8.027
Distancia:124.224 parsecs
Moviment propi RA:12.8
Moviment propi Dec:25.1
B-T magnitude:8.264
V-T magnitude:8.047

Catàlegs i designacions:
Noms Propis
HD 1989HD 166656
TYCHO-2 2000TYC 3106-78-1
USNO-A2.0USNO-A2 1275-09808483
HIPHIP 88997
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