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The second United States Naval Observatory double star CD [recurso electrónico] / Contacts [are] Brian D. Mason and William I. Hartkopf.
— 2006.5. — Washington, D.C. : U.S. Naval Observatory, 2006. 1 CD ROM.
Título de la pantalla de presentación.
Contenido: The Washington double star catalog, 2006.5 / Brian D. Mason, Gary L. Wycoff, and William I. Hartkopf — Sixth catalog of orbits of visual binary stars/ William I. Hartkopf and Brian D. Mason — Fourth catalog of interferometric measurements of binary stars / William I. Hartkopf, Brian D. Mason, Gary L. Wycoff, and Harold A. McAlister — The second photometric magnitude difference catalog / Brian D. Mason, Gary L. Wycoff and William I. Hartkopf — Catalog of rectilinear elements of visual double stars / William I. Hartkopf, Brian D. Mason, Gary L. Wycoff and Dean Kang — Double star astronomy at the U.S. Naval Observatory
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