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Astrophysics and Space Science Library
A celestial reference frame is based on some dynamical or kinematic approximation of an absolute coordinate system and is materialized by a fundamental catalogue of stars. It is characterized by the accuracy of the system and the precision of its stellar realization. The present situation, marked by the construction of the FK5 system and catalogue, is briefly described. It will be an hybrid system based on the discussion of all existing observations. The prospects for improvement in accuracydoi:10.1007/978-94-009-8456-1_7 fatcat:wozxjbh63jdtfesgpyhu7i3bfe