Glossary definition

Ephemeris: Definition, Meaning and Example

Updated August 4, 2026By Zodiac Calendar EditorialReviewed for clarity and sourcing
Quick answer: A table or dataset giving calculated celestial positions for specified times.
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Use the linked guide for the longer explanation and related examples.

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Key takeaways
  • A table or dataset giving calculated celestial positions for specified times.
  • Commonly connected with chart calculation, planetary positions.
  • Its meaning depends on the system and context in which it is used.

Definition

A table or dataset giving calculated celestial positions for specified times.

Why it matters

An ephemeris provides calculated positions of the Sun, Moon, planets or other celestial points at stated times. It is a practical source for checking where an object was on a given date.

Example

An astrologer can use an ephemeris to find the Sun’s zodiac longitude on a birthday or to check when a planet changes signs.

Common confusion

An ephemeris gives positions, not interpretations. The meaning assigned to those positions depends on the system using the data.

Why birth time matters · Research library

Editorial note: Astrological meanings on this page describe traditional interpretations. They are not presented as scientifically proven personality facts.

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