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HD 73431


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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.

HD 72968 /3 Hya/ - Another low amplitude photometric double wave AP star
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978A&A....62..199M&db_key=AST

UVBY photometry of AP stars : the nature of the light variations.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1971AJ.....76..422W&db_key=AST

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Observation and Astrometry data

Constellation:Ύδρα
Right ascension:08h38m01.64s
Declination:-11°44'37.5"
Apparent magnitude:6.559
Distance:112.108 parsecs
Proper motion RA:-22
Proper motion Dec:-2.9
B-T magnitude:6.515
V-T magnitude:6.556

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 73431
TYCHO-2 2000TYC 5437-2457-1
USNO-A2.0USNO-A2 0750-06381795
HIPHIP 42348
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