Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jsrs.meet..110r&link_type=abstract
In: Journées 2004 - systèmes de référence spatio-temporels. Fundamental astronomy: new concepts and models for high accuracy obs
Astronomy and Astrophysics
Astronomy
3
Astrometric Catalogues, Precession, Earth Orientation Parameters
Scientific paper
The new star catalogue EOC-2 has been used for the new solution of Earth Orientation Parameters (EOP) from optical astrometry over the interval 1899.7-1992.0. The same procedures as in the preceding solutions (c.f. Vondrák & Ron 2000) were followed, with two exceptions: 1. The IAU 2000 model of nutation and the improved P03 model of precession (Capitaine et al. 2003) were used which led to much smaller values of the celestial pole offsets (CPO), 2. the CPO in longitude and obliquity were represented by a constant, linear and quadratic terms instead of the 5-day individual values as before. The values obtained for the linear and quadratic terms of the CPO are compared and discussed in view of a possible validation of the P03 precession model.
Capitaine Nicole
Ron Cyril
Vondrák Jan
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