Astronomical Almanac for the Year 2007 and Its Companion, The Astronomical Almanac Online

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United States Department of Defense, Feb 28, 2006 - Nautical almanacs - 555 pages
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The Astronomical Almanac contains a wide variety of both technical and general astronomical information. The book is a worldwide resource for fundamental astronomical data. The material appears in sections, each section addressing a specific astronomical category. The book also includes references to the material, explanations, and examples.  The book is joint publication between U.S. Naval Observatory and Her Majesty's Nautical Almanac Office(HMNAO) in the UK. HMNAO maintains the copyright on the material it produces.

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Phases perigee and apogee mean elements of orbit and rotation lengths of mean months geocentric

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U.S. Naval Observatory and Her Majesty’s Nautical Almanac Office

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