Reference frames and ground-based astrometry

Details Reference frames and ground-based astrometry Reference frames and ground-based astrometry

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13r.609s&link_type=abstract

In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J

Astronomy and Astrophysics

Astronomy

International Celestial Reference System

Scientific paper

Motion and position of the celestial bodies can be described with respect to the reference systems and to their physical materialization - the reference frames. This is the reason for which the ground-based astrometry could not be done without such references. At the same time it contributes even with lower precision than the modern techniques to the improvement of the reference frames. We try to analyze their last contributions as extensions of optical reference frame to faint stars in crowded fields; production of input catalogues for the future space projects; re-observation of existing catalogues for proper motion determination; link optical/radio reference frames; position of radiosource optical counterparts stellar catalogues etc. It is one of the tasks of the WG « The Future Development of Ground-Based Astrometry ».

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