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Hipparcos Astrometric Results

Published online by Cambridge University Press:  14 August 2015

J. Kovalevsky
J. Kovalevsky*
Affiliation:
OCA/CERGA UMR CNRS 6527 Av. Copernic, 06130-Grasse (France)

Abstract

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The astrometric results of Hipparcos include the positions at epoch (1991.25), the proper motion in the new IAU extragalactic reference system (ICRS), and parallaxes for about 118 000 stars. One dimensional positions are also given for 48 asteroids and 3 satellites. Due to the non-isotropy of the scanning law, the uncertainties are position dependent. Some indications of the remaining correlations are given. Various tests and comparisons show that systematic errors in parallax, if any, are not larger than 0.1 millisecond of arc.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 1: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part A), 1997 , 1998 , pp. 536 - 538
Copyright
Copyright © Kluwer 1998

References

ESA 1997, The Hipparcos and Tycho Catalogues, ESA Publ. SP-1200.Google Scholar
Kovalevsky, J., Lindegren, L., Perryman, M.A.C., et al., 1997, A&A, 323, 620–633.Google Scholar
Ma, C. and Feissel, M., 1997, Technical Note 23,Observatoire de Paris, June 1997.Google Scholar