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
The History of the Ephemeris, published in Dutch at Amsterdam in 1675, and in Latin at London in 1681.
"Lives of Eminent Zoologists, from Aristotle to Linnæus" by William MacGillivray
The penumbral line is marked from hour to hour on the maps given annually in the American Ephemeris.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10" by Various
AMERICAN EPHEMERIS and NAUTICAL ALMANAC for the year 1895.
"United States Government Publications, v. 8 Jan-Jun 1892" by Compiled
Its position with respect to Saturn on any given date can be learned from the Ephemeris.
"Astronomy with an Opera-glass" by Garrett Putman Serviss
He is an ephemeris and weather-glass.
"Tablets" by Amos Bronson Alcott
With an Ephemeris and another astrological book, I made out and copied in six hours Mdlle.
"The Memoirs of Jacques Casanova de Seingalt, Vol. IV (of VI), "Adventures In The South" The First Complete and Unabridged English Translation, Illustrated with Old Engravings" by Jacques Casanova de Seingalt
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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
This simple ephemeris gives a reasonable description of the observed main-on times, while the extrapolation to the main-ons observed after the anomalous low-state by the RXTE-ASM show that these occurred ∼7 days (or ∼0.2 in phase) late (or alternatively, ∼0.8 in phase early etc).
A BeppoSAX observation of Her X-1 during the first main-on after an anomalous low-state: evidence for rapid spin-down
Fig. 5 shows the residuals with respect to the best-fit ephemeris assuming the former case. A clear difference between the on-state occurrence times before and after the anomalous low-state is evident.
A BeppoSAX observation of Her X-1 during the first main-on after an anomalous low-state: evidence for rapid spin-down
Accordingly the ephemeris for the time T0 defined as the conjunction time at which the star moves from the blue side to the red side of the RV curve (cf.
Binaries discovered by the SPY project I. HE 1047-0436: a subdwarf B + white dwarf system
The precise ephemeris was determined elsewhere (Woods et al. 2003) from the complete RXTE/PCA data taken during the 2001 April reactivation.
An Extended Burst Tail from SGR 1900+14 with a Thermal X-ray Spectrum
We find no evidence for a systematic shift in phase of the pulse maximum or the slope of the phases (i.e. pulse frequency) relative to the pre-defined ephemeris, i.e., the pulse phase remained steady during the tail.
An Extended Burst Tail from SGR 1900+14 with a Thermal X-ray Spectrum
The time history of the August 29 burst as observed with BATSE was transformed to the SSB and converted to pulse phase for SGR 1900+14 according to the spin ephemeris found from previous work (Woods et al. 1999b).
An Extended Burst Tail from SGR 1900+14 with a Thermal X-ray Spectrum
The correction of TOAs to the reference frame of the SSB requires an accurate ephemeris for the Solar System.
Testing General Relativity with Pulsar Timing
The most commonly used ephemeris is the “DE200” standard from the Jet Propulsion Laboratory [128].
Testing General Relativity with Pulsar Timing
Second, we construct the O−C diagram using a reference (spectroscopic) ephemeris.
The role of ionization in symbiotic binaries
The LLR measurements of the past have contributed to a wide range of scientific investigations [4, 6, 11], and are today solely responsible for production of the lunar ephemeris.
Improving LLR Tests of Gravitational Theory
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