The Khaldea ephemeris is a 3,000-year ephemeris made available online. This astrological ephemeris, which is published by the Khaldea company, charts the stations of planets. The Khaldea ephemeris gives the geocentric longitude of the sun, moon and other planets; its time is calculated according to Greenwich Mean Time or GMT.
An ephemeris is a table that gives positions of astronomical objects in addition to satellites in the sky at a given time. Astronomical positions on ephemerides are given in the spherical polar coordinate system in the format of degrees, as well as in minutes and seconds.
The Khaldea table charts annual astronomical data from 1900 to 2008, according to CyberWorld Khaldea. The astronomical ephemerides used by NASA must be updated every 20 years.