Converse of object

• use: Back to text 40 ] Eg, using the ephemeris to see when the Moon's aspect to the Sun becomes exact.

• predict: During the 19th century observations of the positions of the planet Uranus were seen to be in disagreement with the predicted ephemeris.

• base: A solar-system ephemeris based on UT1 or sidereal time would somehow have to include the unpredictable variations of the Earth's rotation.

Adjective modifier

• personal: It is worth expending some energy on doing this personal ephemeris for a whole year.

Modifies a noun

• datum: A set of ephemeris data is valid for several hours.

• file: The Astrodienst site offers printable ephemeris files in Acrobat PDF format.

• time: Ephemeris time has been superseded by relativistic timescales for current purposes, but for historical purposes the concept of ephemeris time is still valid.

• entry: MJD The Modified Julian Date of the ephemeris entry.

Noun used with modifier

• pulsar: UPDATE parameter FROM qualifier The UPDATE command is used to update one or more parameters of the pulsar ephemeris.