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HD 180912


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Pulkovo compilation of radial velocities for 35495 stars in a common system.
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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. IV - Ground-based accompaniment to the HIPPARCOS observation program
The paper presents 396 radial velocities of stars distributed in 19fields of 4 x 4 degrees. The study employs the Fehrenbach objectiveprism method and the same measuring technique used in a previous paper(Fehrenbach et al., 1987).

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Osservazione e dati astrometrici

Costellazione:Cigno
Ascensione retta:19h15m26.06s
Declinazione:+54°35'01.7"
Magnitudine apparente:8.05
Distanza:285.714 parsec
Moto proprio RA:-0.2
Moto proprio Dec:3.5
B-T magnitude:8.085
V-T magnitude:8.053

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 180912
TYCHO-2 2000TYC 3924-1648-1
USNO-A2.0USNO-A2 1425-09567526
HIPHIP 94634
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