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Observational Techniques and Results for Visual Double Stars

Published online by Cambridge University Press:  12 April 2016

Charles E. Worley
Charles E. Worley*
Affiliation:
U.S. Naval Observatory, Washington, D.C.

Extract

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A little more than a century and a half has passed since F.G.W. Struve began to provide the astronomical world with visual double star measures of both quantity and quality. Since that time, nearly a million individual measures have been made by all techniques, and most of these are now available in machine-readable form in the punch-card Observation Catalog maintained at the Naval Observatory. As of 1 March 1981, this Catalog contained 877242 measures grouped into 398818 means. The data file is now virtually complete for all 20th century observations, and perhaps 80% complete for the 19th century material. Additions are being made steadily and we can look forward to having a complete set of observations for every known double star in a few more years.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 62: Current Techniques in Double and Multiple Star Research , May 1983 , pp. 1 - 9
Copyright
Copyright © Lowell Observatory 1983

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