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Washington Double Star Catalog - Current Version
Users guide. Changes in the Current Version. Additional Information Available.
 
Visual Binaries
Examples: the Castor binary system, the Sirius binary system. Interactive Animations for Binary Systems. Tilt of Binary Orbits.
 
Welcome to the Visual Binaries
Brief history of discovery of binary stars.
 
Visual Binaries
Introduction to orbit properties of binary stars.
 
Orbital Elements
The Orbital Elements of selected visual binaries.
 
Sixth Catalog of Orbits of Visual Binary Stars
U.S. Naval Observatory Visual Binary Stars orbits catalog.
 
AAVSO: Visual Observing Program
Visual binaries observing recommendations by the American Association of Variable Star Observers
 
Visual binary
Information on visual binary stars by Wikipedia, the free encyclopedia.
 
Visual binary stars description from the Astronomy Knowledge Base
Primary visual binary star parameters and properties.
 
Visual Double Stars in Hipparcos
This catalogue is the only complete list of all known double and multiple systems (18644) of which at least one component was identified in the Hipparcos final catalog in July 1997, including the 2994 systems newly discovered by the satellite, as well as the 155 new astrometric orbital pairs also discovered by the satellite.
 
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