The selection of stars for linking the HIPPARCOS frame to extragalactic radio sources by space telescope

Details The selection of stars for linking the HIPPARCOS frame to extragalactic radio sources by space telescope The selection of stars for linking the HIPPARCOS frame to extragalactic radio sources by space telescope

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.177...53a&link_type=abstract

In ESA The Sci. Aspects of the Hipparcos Space Astrometry Mission p 53-55 (SEE N82-30146 20-88)

Astronomy and Astrophysics

Astronomy

1

Astrometry, Esa Satellites, European Space Programs, Extragalactic Radio Sources, Reference Stars, Binary Stars, Holographic Interferometry, Hubble Space Telescope, Inertial Reference Systems, Speckle Patterns

Scientific paper

Seventy-five radio sources south of declination + 5 deg were selected for an inertial reference frame, linking the Hipparcos frame to extragalactic objects, via the Space Telescope. Sources were chosen where there is no visible contamination of the image by any object closer than 15 arcsec. The astrometric properties of six stars were tested by speckle interferometry. Results show that one in three is binary on the scale 0.1 to 1.0 arcsec; none are eclipsing.

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