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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.
Mean positions and proper motions of 305 stars obtained from the combination of PZT observations at Ondrejov with AGK positions Observations of 305 stars carried out at the Ondrejov Observatory in theperiod 1973-1983 were compared to the positions of the same stars in theAGK 2 and AGK 3 catalogs in order to obtain their mean positions andproper motions. The observations were performed in the course of 1140nights using the PZT telescope and comprise more than 32 thousand startransits. The average mean errors in the right ascension and declinationof a star that was observed thoughout the whole period were + or -0.0019 s and + or - 0.019 arcsec in the epoch around 1979. It ispredicted that the errors will increase + or - 0.0055 sec and + or -0.059 arcsec in the year 2000. A table listing the errors in the rightascension and declination is provided.
The determination of mean positions and proper motions of 304 stars from PZT observations at Ondrejov Not Available

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Osservazione e dati astrometrici

Costellazione:	Cassiopea
Ascensione retta:	00^h08^m24.28^s
Declinazione:	+50Â°14'43.2"
Magnitudine apparente:	8.103
Distanza:	458.716 parsec
Moto proprio RA:	17.5
Moto proprio Dec:	-9
B-T magnitude:	8.213
V-T magnitude:	8.113

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 356
TYCHO-2 2000	TYC 3254-1044-1
USNO-A2.0	USNO-A2 1350-00157147
HIP	HIP 679

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