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- W137303200 abstract "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." @default.
- W137303200 created "2016-06-24" @default.
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- W137303200 date "1985-08-01" @default.
- W137303200 modified "2023-09-23" @default.
- W137303200 title "Using Space Telescope to tie the HIPPARCOS and extragalactic reference frames together" @default.
- W137303200 hasPublicationYear "1985" @default.
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