Present status of astrometry.

Details Present status of astrometry. Present status of astrometry.

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997babel.155...71d&link_type=abstract

Bulletin Astronomique de Belgrade, No. 155, p. 71 - 87

Astronomy and Astrophysics

Astronomy

Astrometry, Space Astrometry, Fk5: Reference Systems, Ephemerides, Earth Rotation

Scientific paper

In the history of astronomy the least decade of the 20th century will probably be marked by the end of ground-based classical optical astrometry and the beginning of space and radio astrometry. The attained precision and accuracy of observations by new methods is 1 millisecond of arc. In some domains this limit is even lower. The traditional concept of the realisation of an inertial celestial reference system, based on solar system dynamics, has to be abandoned. Its kinematical realisation is more appropriate. On the level of attained accuracy of time and space positioning, the relativistic corrections are no more negligible. Because of that, the general relativity corrections are introduced in astrometric observation reductions.

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