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\centerline{\bf A DYNAMICAL ANALYSIS OF SYSTEMATIC ERRORS }

\centerline{\bf IN STAR CATALOGUES } 

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{\sl \ Mart\'\i nez Us\'o M.J.}$,$Marco Castillo F., L\'opez Ort\'\i\ J.A.%
{\sl \ }\\ {\sl \ Department of Mathematics}\\ Campus de Penyeta Roja\\%
University Jaume I of Castell\'on\\12071 Castell\'on\\ Spain

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One of the main aims in Astronomy is the definition and materialization of a
precise celestial reference system. The materialization of such a system,
the star catalogues, are affected by two kinds of errors, systematic and
aleatory. A dynamical correction is proposed to deal with systematic errors
in which these errors are treated together with the ones that affect the
orbital elements of the minor planets used in the process.

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