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Astron. Astrophys. 359, 1195-1200 (2000)


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A comparison of the SAO-Hipparcos reference frames

E.F. Arias * , R.G. Cionco, R.B. Orellana[FORMULA] and H. Vucetich[FORMULA]

Facultad de Ciencias Astronómicas y Geofísicas (FCAG), Paseo del Bosque S/N, Universidad Nacional de La Plata, 1900, Argentina

Received 6 December 1999 / Accepted 10 May 2000

Abstract

The reference systems defined by the SAO and Hipparcos catalogues are compared using vector spherical harmonic analysis. The differences between astrometric data in both catalogues have been grouped into different data sets and separate harmonic analysis performed on them. The Fourier coefficients yield estimates of systematic errors in SAO catalogue.

Key words: astrometry – reference systems – catalogs

* Member of CONICET

Send offprint requests to: R.B. Orellana (rorellana@fcaglp.fcaglp.unlp.edu.ar)

© European Southern Observatory (ESO) 2000

Online publication: July 13, 2000

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