TYCHO astrometry

Details TYCHO astrometry TYCHO astrometry

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989hmps....3..195h&link_type=abstract

In its The Hipparcos Mission. Prelaunch Status. Volume 3: The Data Reductions p 195-204 (SEE N90-13548 05-18)

Statistics

Computation

Astrometry, Data Bases, Data Reduction, Mathematical Models, Reference Stars, Accuracy, Computational Grids, European Space Programs, Hipparcos Satellite, Parameter Identification, Photons, Stellar Magnitude, Stellar Parallax

Scientific paper

The Tycho astrometric data processing for Hipparcos satellite data reduction in described. It deals with the transit times to the astrometric parameters of the Tycho stars. The observed transit time and the predicted values are compared. A mathematical formulation of the astrometry task is outlined. The positions for some 500,000 stars with an accuracy of about 0.03 arcsec root mean square for the majority of faint stars at about B = 11 magnitude are obtained. Double stars with separations larger than about 2 arcsec are resolved.

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