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The understanding of the FK5 and Hipparcos proper-motion systems†

Published online by Cambridge University Press:  01 October 2007

Z. Zhu
Z. Zhu*
Affiliation:
Department of Astronomy, Nanjing University, China email: zhuzi@nju.edu.cn
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Abstract

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Comparing proper motions of the FK5 and Hipparcos, several authors declared that the two proper-motion systems are inconsistent with the value of the precession correction obtained from VLBI and LLR observations. Based on the proper-motion data from the PPM and ACRS catalogues which are constructed on the FK5 system, the inconsistent values of the precessional correction and of the time-dependent term of equinox correction, derived from the different subsets of stellar samples, have been found. One of the reasons for those discrepancies should be mostly due to the internally biased proper-motion system of the FK5.

Keywords

astrometryGalaxy: fundamental parametersreference systems
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 18 - 19
Copyright
Copyright © International Astronomical Union 2008

References

ESA 1997, The Hipparcos and Tycho Catalogues SP-1200Google Scholar
McCarthy, D. D. & Captaine, N. 2002, IERS Technical Note 29, 9Google Scholar
Mignard, F. & Fraeschlé, M. 2000, A&A 354, 732Google Scholar
Miyamoto, M. & Sôma, M. 1993, AJ 105, 691CrossRefGoogle Scholar
Perryman, M. A. C., Lindegren, L., Kovalevsky, J., et al. 1997, A&A 323, L49Google Scholar
Walter, H. G. & Hering, R. 2005, A&A 431, 721Google Scholar
Zhu, Z. 2000, PASP 112, 1103CrossRefGoogle Scholar