Using Space Telescope to tie the HIPPARCOS and extragalactic reference frames together

Details Using Space Telescope to tie the HIPPARCOS and extragalactic reference frames together Using Space Telescope to tie the HIPPARCOS and extragalactic reference frames together

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985esasp.234..261h&link_type=abstract

In ESA The European Astrometry Satellite HIPPARCOS: Scientific Aspects of the Input Catalog Preparation p 261-263 (SEE N86-1838

Astronomy and Astrophysics

Astronomy

5

Celestial Reference Systems, Hipparcos Satellite, Hubble Space Telescope, Intergalactic Media, Reference Stars, Astronomical Catalogs, Extragalactic Radio Sources, Stellar Motions

Scientific paper

Hubble Space Telescope observations will be made to tie the HIPPARCOS Instrumental System (HIS) to extragalactic objects, to determine the overall rotation of the HIS with respect to a set of extragalactic objects; to compare the HIS to an accurate radio reference frame; and to look for motions in the optical centroids of compact extragalactic objects at the level of 0.001 arcseconds per year. About 75 radio sources and extragalactic objects will be chosen from the initial group of 414 pairs. The egos will have their positions and proper motions determined relative to the HIPPARCOS Input Catalog stars. The candidate stars are being screened by ground based speckle interferometry to select a final set.

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