Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996cemda..66...97s&link_type=abstract
Celestial Mechanics and Dynamical Astronomy, Volume 66, Issue 1, pp.97-106
Astronomy and Astrophysics
Astronomy
Scientific paper
The introduction of the extragalactic reference frame and the availability of the Hipparcos and Tycho catalogs will have major impacts on changing the accuracy levels of astrometry in the future. There is a need for accurate densification of the reference frames down to at least 20th magnitude, Also accurate space motions and distances will be required. The ground based observations must be supplemented by space missions. In addition to traditional positional astrometry, the scientific applications of planetary detection, distance scales, multiple star systems, mass detections, solar system motions and geodesy will be advanced by the new accuracies.
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