Ephemeris ✓

Usually given in spherical polar systems (Right Ascension and Declination).

While printed almanacs are still produced for emergency use, most professionals use electronic datasets: Ephemeris - an overview | ScienceDirect Topics

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. Ephemeris

Calculations have evolved from using Earth’s variable rotation (Universal Time) to highly uniform scales like Ephemeris Time (ET) and its successors, Terrestrial Time (TT) and Barycentric Dynamical Time (TDB), which incorporate relativistic corrections. Leading Sources and Software

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 Usually given in spherical polar systems (Right Ascension

Times of solar/lunar eclipses, planetary ingresses (moving into a new sign), and retrograde motion.

Historically used by mariners to find their way at sea, ephemerides remain a vital backup to modern satellite systems. Core Applications Times of solar/lunar eclipses

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