- a table showing the positions of a heavenly body on a number of dates in a regular sequence.
- an astronomical almanac containing such tables.
- Archaic. an almanac or calendar.
Origin of ephemeris
Examples from the Web for ephemeris
A Table of artificial numbers; to be found at the back of "Raphael's" Ephemeris.How to Read the Crystal
Take in hand, then, the Ephemeris for the year of your birth and read this chapter with it in view.Astrology
And now not only is it slightly off course, but so is every ephemeris printed on Mert.Conquest Over Time
Its position with respect to Saturn on any given date can be learned from the Ephemeris.Astronomy with an Opera-glass
Garrett Putman Serviss
With an Ephemeris and another astrological book, I made out and copied in six hours Mdlle.The Memoires of Casanova, Complete
Jacques Casanova de Seingalt
- a table giving the future positions of a planet, comet, or satellite
- an annual publication giving the positions of the sun, moon, and planets during the course of a year, information concerning eclipses, astronomical constants, etc
- obsolete a diary or almanac
Word Origin and History for ephemeris
table showing predicted positions of heavenly bodies, 1550s, Modern Latin, from Greek ephemeris "diary, calendar," from ephemeros "daily" (see ephemera). The classical plural is ephemerides.
- A table giving the coordinates of a celestial body at specific times during a given period. Ephemerides can be used by navigators to determine their longitude while at sea and by astronomers in following objects such as comets. The use of computers has allowed modern ephemerides to determine celestial positions with far greater accuracy than in earlier publications.