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The American Ephemeris and Nautical Almanac was published for the years 1855 to 1980, containing information necessary for astronomers, surveyors, and navigators. It was based on the original British publication, The Nautical Almanac and Astronomical Ephemeris, with which it merged to form The Astronomical Almanac, published from the year 1981 to the present.
The Nautical Almanac has been the familiar name for a series of official British almanacs published under various titles since the first issue of The Nautical Almanac and Astronomical Ephemeris, for 1767: [1] this was the first nautical almanac to contain data dedicated to the convenient determination of longitude at sea.
[1] [2] In the United States, a nautical almanac has been published annually by the US Naval Observatory since 1852. [2] It was originally titled American Ephemeris and Nautical Almanac. Since 1958, the USNO and HMNAO have jointly published a unified nautical almanac, The Astronomical Almanac for use by the navies of both countries. [2]
Newcomb's Tables of the Sun (full title Tables of the Motion of the Earth on its Axis and Around the Sun) [a] is a work by the American astronomer and mathematician Simon Newcomb, published in volume VI of the serial publication Astronomical Papers Prepared for the Use of the American Ephemeris and Nautical Almanac. [1]
[1] [2] His textbook "Navigation and Nautical Almanac" was used for over thirty years in instruction at the Naval Academy. [1] Coffin served as the superintendent of the American Ephemeris and Nautical Almanac starting on May 1, 1866. In 1867, he moved from Cambridge, Massachusetts, to Washington, D.C., when the almanac moved its place of ...
The Astronomical Almanac is the direct descendant of the British and American navigational almanacs. The British Nautical Almanac and Astronomical Ephemeris had been published since 1766, and was renamed The Astronomical Ephemeris in 1960. The American Ephemeris and Nautical Almanac had been published since 1852.
Software is widely available to assist with this form of navigation; some of this software has a self-contained ephemeris. [9] When software is used that does not contain an ephemeris, or if no software is used, position data for celestial objects may be obtained from the modern Nautical Almanac or Air Almanac. [10]
Air Almanac [11] Astronomical Almanac; Astronomical Phenomena [12] The Astronomical Pocket Diary (1987–present) Multiyear Interactive Computer Almanac [13] The Nautical Almanac (1767–present under various titles; prepared by U.S. Naval Observatory and Her Majesty's Nautical Almanac Office since 1958) Star Almanac for Land Surveyors [14]