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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.

Hyades and Sirius supercluster members brighter than magnitude (V) 7.1. II - Right ascension six to twelve hours
The present star sample is contained in the Bright Star Catalogue andits Supplement, augmented with a further supplement of 788 stars foundduring various observing programs over the past 40 years. Accurate,four-color and H-beta, or (RI), photometry is available for most of thesupercluster members. The criteria for membership are the comparisons ofthe proper motion, radial velocity, and luminosity obtained from thesupercluster parameters with the observed motions and the luminosityderived from the photometric parameters. New proper motions, based onall available catalogs, have been derived for the additional 788 starsdiscussed here, as well as all supercluster members.

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Dades d'Observació i Astrometria

Constel·lació:Hydra
Ascensió Recta:09h17m32.93s
Declinació:+00°33'17.6"
Magnitud Aparent:6.963
Distancia:105.263 parsecs
Moviment propi RA:17.7
Moviment propi Dec:-24.7
B-T magnitude:7.179
V-T magnitude:6.981

Catàlegs i designacions:
Noms Propis
HD 1989HD 80046
TYCHO-2 2000TYC 227-2547-1
USNO-A2.0USNO-A2 0900-06352093
HIPHIP 45592

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