The Treatment of Double Stars in the Hipparcos-Tycho Programme

J. L. Halbwachs, E. Høg, V. V. Makarov, K. Wagner, A. Wicenec

Research output: Chapter in Book/Conference paperChapterpeer-review


The Tycho Catalogue1 contains astrometric data and (B, V) photometry for more than one million stars. The double stars with separations wider than about 3 arcsec appear as two separate entries as if they were two single stars. Between 1.5 and 3 arcsec, the two components are possibly also separate entries, but the photometric data is somewhat less accurate. Double stars with separations as close as 0.4 arcsec were also detected in the Tycho observations, and they are flagged in the Catalogue.
Original languageEnglish
Title of host publicationVisual Double Stars: Formation, Dynamics and Evolutionary Tracks
EditorsJ. A. Docobo, A. Elipe, H. McAlister
PublisherSpringer Dordrecht
ISBN (Print)978-0-7923-4793-4
Publication statusPublished - 1997

Publication series

NameVisual Double Stars : Formation, Dynamics and Evolutionary Tracks. Edited by J.A. Docobo, A. Elipe, and H. McAlister. Dordrecht : Kluwer Academic, 1997.


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