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First Double Star Observations in the HIPPARCOS Tycho Project

Published online by Cambridge University Press:  12 April 2016

Jean–Louis Halbwachs
Jean–Louis Halbwachs*
Affiliation:
CDS, URA 1280, Observatoire de Strasbourg 11, rue de l’Universite, F-67000 Strasbourg, France

Abstract

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The Tycho project will provide positions and (B, V) magnitudes for about 1 million stars, and will be complete for stars brighter than magnitude (B + V)/2 = 10.5. The components of double stars will obtain individual measurements when the separations are wider than 3″.

Type
Hipparcos First Results
Information
International Astronomical Union Colloquium , Volume 135: Complementary Approaches to Double and Multiple Star Research , 1992 , pp. 429 - 434
Copyright
Copyright © Astronomical Society of the Pacific 1992

References

Egret, D., Didelon, P., McLean, B.J., Russel, J.A., & Turon, C. 1992, A&A, 258 Google Scholar
Halbwachs, J.L., Hog, E., Bastian, U., Hansen, P.C., & Schwekendiek, P. 1992, A&A, 258 Google Scholar
Høg, E., Bastian, U., Egret, D., et al. 1992, A&A, 258 Google Scholar