Optical positions of radiostars. II.
Bibcode: 1990A&AS...83..235C
Costa, E.; Loyola, P.
Chile
Abstract
Precise optical positions, relative to either the Perth 70 or the AGK3R catalogs, have been obtained for 40 radiostars proposed to the Hipparcos observing list. Precision levels between 0.18 and 0.29 arcsecs were obtained.
1990
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Astronomy and Astrophysics Supplement Series
Hipparcos
4