Ephemeris · Verified Source

An (plural: ephemerides ) is a tabulation of the computed positions and velocities of celestial bodies—such as planets, moons, asteroids, and satellites—at specific dates and times. Derived from the Greek word for "diary," it serves as an itinerary for astronomical objects, providing essential data for navigation, scientific research, and astrology. Core Applications

Historically used by mariners to find their way at sea, ephemerides remain a vital backup to modern satellite systems. Ephemeris

While printed almanacs are still produced for emergency use, most professionals use electronic datasets: Ephemeris - an overview | ScienceDirect Topics An (plural: ephemerides ) is a tabulation of

Astrologers use these tables to track planetary "transits" (the movement of planets through zodiac signs) and generate birth charts. Scientific and Technical Data While printed almanacs are still produced for emergency

Modern GNSS signals transmit "broadcast ephemeris" data. This contains precise orbital parameters that your phone or car's GPS receiver uses to calculate the satellite’s exact position, allowing it to determine your location on Earth.

Missions like Hayabusa2 rely on updated ephemerides of asteroids to achieve high-precision landings (within 100 metres).