Comparison of the FK5 Frame to HIPPARCOS

Details Comparison of the FK5 Frame to HIPPARCOS Comparison of the FK5 Frame to HIPPARCOS

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402...57m&link_type=abstract

Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 57-60

Computer Science

5

Scientific paper

We have compared the overall properties in position and proper motion of the FK5 to Hipparcos for the 1535 stars of the basic FK5. The analysis carried out with an expansion of the differences [Delta alpha cosine(delta)], [Delta delta] on a basis of spherical orthogonal functions, and similarly for the proper motion, gives the global rotation and spin between the two reference frames at 1991.25. The residuals after the rotation is removed show large regional distortions up to 150 mas. We discuss the consequence of the non-zero spin in term of the rotation of the FK5 frame with respect to the kinematical frame and characterize the main features of the regional errors.

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