A set of data that provides the assigned places of a celestial body (including a manmade satellite) for regular intervals. Ephemeris data help to characterize the conditions under which remote sensing data are collected and may be used to correct the sensor data prior to analysis.
Book of data concerning the movement of Fragments in the Abyss, used by members of the Navigator's Guild.
a table of times with predicted positions for moving object
A book of tables showing the zodiac position of each planet every day of the year. It may look boring, but it's one of the most fascinating books in the world. See also the Online Ephemeris.
A tabular statement of the assigned places of a celestial body at regular intervals.
a tabulation of the positions of a celestial object in an orderly sequence for a number of dates.
An Ephemeris is a position of an object at a particular time, or a list of such positions. Frequently, other time-dependent information is included, like the Apparent Visual Magnitude, and derivatives of the position. For radar astronomy, the position must include the range and the Doppler shift of the object, as well as the more usual astronomical Right Ascension and Declination, because the receivers must be tuned to the correct frequency to be able to detect the echo.
(Greek) 1. Table showing the daily places of a planet. 2. Almanac of such tables.
A table giving the coordinates of a celestial body at a number of specific times during a given period.
A tablular listing of the positions of heavenly bodies which are moving relative to the stars, and which therefore have inconstant, or ephemeral positions.
Information relating to the orbital paths of satellites. The position of an astronomical body.
A mathematical model of where the satellites are positioned in the sky. [Section 5.1
an annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year; "today computers calculate the ephemerides"
a book of planetary positions covering a particular time period (year, decade,century, etc
a book of tables which show the positions of the Sun, Moon and planets, usually for each day, at a stated time
a book that contains the daily position of the planets, Sun, and Moon as seen from Earth
a book that has all the planetary placements in it
a book that lists the position of the planets at any particular time
a daily listing of planetary positions (including the sun and moon) for noon or midnight as viewed from the Greenwich Observatory in England
a daily table of such times
a day-by-day listing of the astrological positions of each planet
a day-by-day listing of the zodiac
a log of predicted sun and star locations with respect to time
a table giving the location of the various planets of the Zodiac by day and month
a table of astronomical data
a table of coordinates which enables the prediction of position and movements of celestial objects
a table showing the precalculated position of a satellite at any given time
a timetable, it's a map that tells where the planets are, at a certain time, in the year, in the day, in the month
a twin sister of the Almanac, and gives the geocentric Longitudes and Declinations for the current year
Astronomer's almanac of celestial information.
An astrologer's reference book which lists the positions (signs) of the planets at exact points each day over a long period. Used to construct birth charts, among many other things.
A set of parameters used by a receiver to calculate the location of a navigation satellite and its clock behavior. Each navigation satellite transmits ephemeris data about its own orbit and clock. Ephemeris data is more accurate than almanac data. It is typically good for only 4-6 hours. Ephemeris data is transmitted by the satellite every 30 seconds. The plural of ephemeris is ephemerides. (See Almanac).
A list of the successive positions of a celestial object on the geocentric celestial sphere for a series of equally spaced times.
A tabular statement of the spatial coordinates of a celestial body or a spacecraft as a function of time. Source: EPO.
Pronounced ee-FEM-er-is (ef-fi-MARE-uh-deez). A table listing specific data of a moving object, as a function of time. Ephemerides usually contain right ascension ("R.A." in these web pages) and declination ("Decl." in these web pages), apparent angle of elongation ("Elong." in these web pages) from the sun (in degrees), and magnitude (brightness) of the object; other quantities frequently included in ephemerides include the objects distances from the sun and earth (in AU), usually given as Roman letter "r" and Greek letter "Delta", respectively; phase angle; and moon phase.
A table that lists computed positions of a celestial body for various days of a given period.
Current satellite position and timing information transmitted as part of the satellite data message.
The predictions of current satellite position that are transmitted to the user in the data message.
Table of predicted positions of bodies in the solar system.
A chart that shows the precise positions of the planets daily that is necessary in order for astrologers to construct charts.
A list of accurate positions or locations of a celestial object as a function of time. Available as "broadcast ephemeris" or as postprocessed "precise ephemeris."
An almanac which lists the Zodiacal positions of the Planets and other astronomical data for a given time period. Plural is ephemerides.
A book containing the placement of every planet for every day of the year.
a table that gives the positions of astronomical objects at certain intervals of time.
A table of data arranged by date. Ephemeris tables are typically to list the positions of the Sun, Moon, planets and other solar system objects.
Pronounced "eh-FEM-er-is". A book that supplies the positions of the Sun, Moon and Planets, usually daily. Positions are usually given in celestial longitude, latitude and declination. Noted are the eclipses and the ingresses of each planet, the Moon Nodes and Sidereal Time. Plural is referred to as ephemerides. They are usual for Noon or Midnight Greenwich Time. To view this month's midnight ephemeris of Central Daylight Savings time click here.
almanac The description of the satellite orbits and clock correction parameters variable over time used for positioning and baseline computations. The ephemerise may be broadcast (projected ahead into time and subject to selective availability) or precise (post-fitted).
Periodical publication which lists the predicted positions of celestial bodies at regular intervals, and the times of astronomical occurrences. It also contains other data of interest to astronomers.
An ephemeris is a table listing the spatial coordinates of celestial bodies and spacecraft as a function of time.
A listing of the Sun, Moon, and planets' positions and related information for astrological purposes.
A map and calendar of the movement of celestial bodies or satellites.
A table of predicted satellite orbital locations for specific time intervals. The ephemeris data helps to characterize the conditions under which remotely sensed data is collected and is commonly used to correct the sensor data prior to analysis.
A book containing the daily movements of the planets.
The lovely little book that tells us what was where, when in the heavens. No matter how many computer programs I find, I always trust my ephemeris in my lap.
(plural: ephemerides) An almanac that lists the zodiacal positions of the planets and other astronomical data.
A book used by a Navigator to record the positions of the fragments and the flow in the abyss.
The position of a satellite in space as a function of time. Ephemeris data are used for gridding satellite imagery. Since ephemeris data are based solely on the predicted position of the satellite, an ephemeris is susceptible to errors from vehicle pitch, orbital eccentricity, and the oblateness of the earth.
Tables of planetary places used to find their positions in the zodiac. Now widely available in computerised form.
An ephemeris (plural: ephemerides) (from the Greek word ephemeros = daily) was, traditionally, a table providing the positions (given in a Cartesian coordinate system, or in right ascension and declination or, for astrologers, in longitude along the zodiacal ecliptic), of the Sun, the Moon, the planets, asteroids or comets in the sky at a given moment in time; the astrological positions are usually given for either noon or midnight depending on the particular ephemeris that is used. In 1554, Johannes Stadius published a well-known work known as Ephemerides novae at auctae that attempted to give accurate planetary positions. The effort was not entirely successful, and there were, for example, periodic errors in Stadius’ Mercury positions of up to ten degrees.