ephemeris

Definitions

  • WordNet 3.6
    • n ephemeris an annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year "today computers calculate the ephemerides"
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Webster's Revised Unabridged Dictionary
    • Ephemeris (Literature) A collective name for reviews, magazines, and all kinds of periodical literature.
    • Ephemeris A diary; a journal.
    • Ephemeris (Anat) A publication giving the computed places of the heavenly bodies for each day of the year, with other numerical data, for the use of the astronomer and navigator; an astronomical almanac; as, the “American Ephemeris and Nautical Almanac.”
    • Ephemeris (Anat) Any tabular statement of the assigned places of a heavenly body, as a planet or comet, on several successive days.
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Century Dictionary and Cyclopedia
    • n ephemeris A daily record; a diary; a chronological statement of events by days; particularly, an almanac; a calendar: in this sense formerly sometimes with the plural as singular.
    • n ephemeris In astronomy, a table or a collection of tables or data showing the daily positions of the planets or heavenly bodies, or of any number of them; specifically, an astronomical almanac, exhibiting the places of the heavenly bodies throughout the year, and giving other information regarding them, for the use of the astronomer and navigator. The chief publications of this sort are the French “Connaissance des Temps” (from 1679), the British “Nautical Almanack and Astronomical Ephemeris” (from 1766), the Berlin “Astronomisches Jahrbuch” (from 1776), and the “American Ephemeris and Nautical Almanac” (from 1855).
    • n ephemeris Anything lasting only for a day or for a very brief period; something that is ephemeral or transient; especially, a publication or periodical of only temporary interest or very short duration.
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Chambers's Twentieth Century Dictionary
    • ns Ephemeris an account of daily transactions: a journal: an astronomical almanac:—pl. Ephemerides (ef-e-mer′i-dēz)
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Etymology

Webster's Revised Unabridged Dictionary
L., a diary, Gr. , also, a calendar, fr. . See Ephemera
Chambers's Twentieth Century Dictionary
Through L.,—Gr. ephēmeros, living a day—epi, for, hēmera, a day.

Usage

In literature:

The issue of the Nautical Ephemeris was intrusted to Dr. Maskelyne.
"Side-lights on Astronomy and Kindred Fields of Popular Science" by Simon Newcomb
Suetonius, who enumerates Caesar's writings (Caesar, 55, 56), mentions no Ephemeris.
"Plutarch's Lives Volume III." by Plutarch
Merlini Anglici Errata; or the Errors, Mistakes, &c. of Mr. William Lilly's new Ephemeris for 1647, printed 1647.
"The Lives of the Poets of Great Britain and Ireland (1753)" by Theophilus Cibber
Ephemeris, how to use, 260, 264.
"Other Worlds" by Garrett P. Serviss
Wish we had an Ephemeris, a couple of I-P solar charts, and a real telescope.
"Spacehounds of IPC" by Edward Elmer Smith
He checked the time with the satellite ephemeris.
"Pushbutton War" by Joseph P. Martino
EPHEMERIS, OR NAUTICAL ALMANAC.
"The Sailor's Word-Book" by William Henry Smyth
Knowing the location of Venus in the sky, which can be ascertained from the Ephemeris, the observer can find it by day.
"Pleasures of the telescope" by Garrett Serviss
And now not only is it slightly off course, but so is every ephemeris printed on Mert.
"Conquest Over Time" by Michael Shaara
Possibly the Latin Ephemeris was the work of Septimius himself.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4" by Various
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In science:

They can be applied to a number of principal problems of modern astronomy and timekeeping metrology including the search for stochastic gravitational wave background in the early universe, testing General Relativity and establishing of new ephemeris time scale.
Millisecond and Binary Pulsars as Nature's Frequency Standards. II. Effects of Low-Frequency Timing Noise on Residuals and Measured Parameters
We used the DE200 ephemeris of the Jet Propulsion Laboratory (Standish 1982) to transform the TOAs to the solar system barycenter and the Blandford & Teukolsky (1976) model for timing pulsars in binary systems.
Millisecond Pulsar Velocities
Millisecond and binary pulsars are the most stable natural frequency standards which admits to introduce modified versions of universal and ephemeris time scales based correspondingly on the intrinsic rotation of pulsar and on its orbital motion around barycenter of a binary system.
Millisecond and Binary Pulsars as Nature's Frequency Standards. III. Fourier Analysis and Spectral Sensitivity of Timing Observations to Low-Frequency Noise
Solid line is ephemeris provided by Flanagan.
Post-Glitch RXTE-PCA Observations of the Vela Pulsar
In order to investigate whether the 35 day on-states observed after the anomalous low-state occurred at times consistent with their ephemeris before the low-state RXTE-ASM data covering the interval 1996 January 05 to 2001 February 26 were used.
A BeppoSAX observation of Her X-1 during the first main-on after an anomalous low-state: evidence for rapid spin-down
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Related words