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Celestial Reference Systems — An Overview

Published online by Cambridge University Press:  12 April 2016

J. Kovalevsky
J. Kovalevsky*
Affiliation:
CERGA, Observatoire de la Côte d’Azur, 06130 Grasse, France

Abstract

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The paper starts with a short presentation of the conceptual foundations of celestial reference systems and of the IAU decisions taken in 1991. The necessity to define and use them in the framework of General Relativity induces some difficulties that are analyzed. In the case of kinematically defined reference systems, the origins of a possible residual rotation of the frames is analyzed. The same analysis holds also for an isolated dynamical reference system, for which further developments of the metric are necessary. Finally, a few topics concerning the non-isolated case of the barycentric reference system, the transformation between reference systems, and the significance of measurements are mentioned.

Type
Section 1. Celestial Reference System and Frame
Information
International Astronomical Union Colloquium , Volume 180: Towards Models and Constants for Sub-Microarcsecond Astrometry , March 2000 , pp. 1 - 9
Copyright
Copyright © US Naval Observatory 2000

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