Abstract The construction of a new extragalactic all-sky reference frame based on groundbased high precision optical and radio astrometry of selected compact radio sources and radio stars has been started in 1987 as a joint longterm project involving several astrometric facilities in both hemispheres. At present this system is based on a masterlist of about 400 extragalactic sources, mostly displaying optical counterparts and about 100 radio stars. A progress report is given with special view to an application for the HIPPARCOS extragalactic reference link.


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    Titel :

    Groundbased optical and radio astrometry of Hipparcos extragalactic link objects


    Beteiligte:
    de Vegt, Chr. (Autor:in) / Zacharias, N. (Autor:in) / Johnston, K.J. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 11 , 2 ; 133-136


    Erscheinungsdatum :

    1991-01-01


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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