With the advancement in technology, Ephemeris today is calculated electronically with the help of mathematical models based on the movement of celestial bodies via-a-vis that of the Earth. Such a diary was, therefore, termed as Planetary Ephemeris. As a result, such a tabular compilation would usually last for a day only to be replaced by new values on the following day. These attributes tend to change from time to time with the change in the trajectory of the celestial bodies.
Since ancient times, the current planetary positions on a given date (Grah position or Grah Stithi) have been assigned printed values in a tabular format. Ephemeris meaning in Latin is diary or journal.
