ephemeris day
Смотреть что такое "ephemeris day" в других словарях:
ephemeris — /i fem euhr is/, n., pl. ephemerides /ef euh mer i deez /. 1. a table showing the positions of a heavenly body on a number of dates in a regular sequence. 2. an astronomical almanac containing such tables. 3. Archaic. an almanac or calendar.… … Universalium
ephemeris time — The uniform measure of time defined by the laws of dynamics and determined in principle from the orbital motions of the planets, specifically the orbital motion of the earth as represented by Newcomb’s Tables of the Sun. An ephemeris day equals… … Aviation dictionary
ephemeris — e•phem•er•is [[t]ɪˈfɛm ər ɪs[/t]] n. pl. e•phe•mer•i•des [[t]ˌɛf əˈmɛr ɪˌdiz[/t]] 1) astron. a table showing the positions of a heavenly body on a number of dates in a regular sequence 2) astron. an astronomical almanac containing such tables 3)… … From formal English to slang
Ephemeris time — (ET) is a time scale used in ephemerides of celestial bodies, in particular the Sun (as observed from the Earth), Moon, planets, and other members of the solar system. This is distinct from Universal Time (UT): the time scale based on the… … Wikipedia
Ephemeris — E*phem e*ris, n.; pl. {Ephemerides}. [L., a diary, Gr. ?, also, a calendar, fr. ?. See {Ephemera}.] 1. A diary; a journal. Johnson. [1913 Webster] 2. (Anat.) (a) A publication giving the computed places of the heavenly bodies for each day of the… … The Collaborative International Dictionary of English
ephemeris — [e fem′ər is, ifem′ər is] n. pl. ephemerides [ef΄ə mer′ə dēz΄] [L < Gr ephēmeris, diary, calendar < ephēmeros: see EPHEMERON] 1. a table giving the computed positions of a celestial body for every day of a given period 2. an astronomical… … English World dictionary
Day — For other uses, see Day (disambiguation). Water, Rabbit, and Deer: three of the 20 day symbols in the Aztec calendar, from the Aztec calendar stone. A day is a unit of time, commonly defined as an interval equal to 24 hours … Wikipedia
ephemeris — [ɪ fɛm(ə)rɪs, fi:m ] noun (plural ephemerides ˌɛfɪ mɛrɪdi:z) Astronomy & Astrology a table of the calculated positions of a celestial object at regular intervals throughout a period. Origin C16: from L., from Gk ephēmeros lasting only a day … English new terms dictionary
Julian day — JDN redirects here. For the military IT system, see Joint Data Network. For the comic book character Julian Gregory Day, see Calendar Man. Not to be confused with Julian year (disambiguation). Julian day is used in the Julian date (JD) system of… … Wikipedia
JDE — Julian Ephemeris Day Contributor: MSFC … NASA Acronyms
JED — Julian Ephemeris Day Contributor: MSFC … NASA Acronyms
