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The Hipparcos results1

Published online by Cambridge University Press:  25 May 2016

C. Turon
C. Turon*
Affiliation:
Dasgal / URA CNRS 335, Observatoire de Paris-Meudon 92 195 MEUDON Cedex, France

Abstract

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After a brief presentation of the Hipparcos mission, and an overview of the astrometric and photometric results obtained from the main mission and from Tycho, more details are given on the parallaxes. Absolute parallaxes have been obtained for 117 955 entries of the Hipparcos Catalogue, out of a total of 118 218, with a median precision of 0.97 mas for stars brighter than 9. This precision varies with apparent magnitude and ecliptic latitude. The estimated systematic error is smaller than 0.1 mas. The distances of more than 20 000 stars are determined to better than 10 %. Some more statistics are presented.

A few applications of this fantastic amount of new and accurate data are presented, in the fields of absolute magnitude calibrations, stellar physics, distance scale determination.

Type
Stellar Distances
Information
Symposium - International Astronomical Union , Volume 189: Fundamental Stellar Properties: The Interaction Between Observation and Theory , 1997 , pp. 9 - 18
Copyright
Copyright © Kluwer 1997 

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