Nautical Almanac


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Nautical Almanac:

see ephemerisephemeris
(pl., ephemerides), table listing the position of one or more celestial bodies for each day of the year. The French publication Connaissance de Temps is the oldest of the national astronomical ephemerides, founded in 1679.
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nautical almanac

[′nȯd·ə·kəl ′ȯl·mə‚nak]
(navigation)
A book published annually by the governments of the principal maritime nations which contains the astronomical data required for navigation by observations of celestial objects; an abridged version is known as the abridged nautical almanac.
References in periodicals archive ?
The check star, 61-Cyg A, was selected because its B, V, R and I magnitudes are well known and it is also listed as a reference star in the Nautical Almanac (1992).
However, in their calculation of the Besselian elements, HM Nautical Almanac Office have adopted a larger, IAU-recommended value of k, the ratio of the Moon's radius to the Earth's equatorial radius.
In the end, his chronometer, as well as the "lunar-distance method" and the nautical almanac developed by Nevil Maskelyne, then the Astronomer Royal at Greenwich Observatory (August issue, page 99), became widely used for calculating longitude.
The Astronomical Almanac for the Year 2001, Nautical Almanac Office (U.
The Astronomical Almanac for the Year 2000, Nautical Almanac Office (U.
Some of the RGO's educational activities will continue at the institution's original home in Greenwich (London), while its Nautical Almanac Office will now operate out of the Rutherford Appleton Laboratory.
The Astronomical Almanac, which replaced both the venerable American Ephemeris and Nautical Almanac and the Astronomical Ephemeris in 1981, is a weighty, stern publication largely targeted for professional astronomers.
Throughout his long life Harrison remained very much at odds with influential British astronomers like James Bradley and later Nevil Maskelyne, founder of the Nautical Almanac.