ephemeris
noun
- table of values that gives the positions of astronomical objects in the sky at a given time or times
Wiktionary
Pronunciation: /ɪˈfɛməɹɪs/ / /ɪˈfɛməɹəs/
noun
Etymology: From New Latin ephēmeris, from Ancient Greek ἐφημερίς (ephēmerís, “diary, calendar”), from ἐφήμερος (ephḗmeros, “daily”).
- A journal or diary.
“Wee heard the King was solacing at the Caspian Sea, whither now wee are travelling. Till then let us keepe an Ephemerides or day-journey.”
- A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination.
“[…]Mr. Samuel got 150 pounds of bread, with a small quantity of rum and wine, also a quadrant and compass; but he was forbidden on pain of death to touch either map, ephemeris, book of astronomical observations, sextant, timekeeper, or any of my surveys or drawings.”
- Computer software that calculates the apparent position of celestial bodies.