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AsteriaStar
Dataset

Coordinate & Time Systems Dataset

The astrometry and time foundation — the coordinate systems (RA/Dec, equatorial, galactic, ecliptic, horizontal, supergalactic) and the astrometric effects (precession, nutation, aberration, refraction, light-time, Earth orientation) added by the Coordinates, Time & Reference Systems program. Only well-established, standard definitions; nothing fabricated.

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Generated from the canonical knowledge graph. Open, machine-readable, and free to reuse under CC BY-SA 4.0.

Version
1.0.0
Entities
14
Last generated
2026-06-29
License
CC BY-SA 4.0
Checksum
— (published at release)

Sample (14 of 14)

NameType
Atmospheric RefractionAstrometric effect
DeclinationCoordinate system
Earth Orientation ParametersAstrometric effect
Light-Time CorrectionAstrometric effect
NutationAstrometric effect
PrecessionAstrometric effect
Right AscensionCoordinate system
The Aberration of LightAstrometric effect
The Celestial SphereCoordinate system
The Ecliptic Coordinate SystemCoordinate system
The Equatorial Coordinate SystemCoordinate system
The Galactic Coordinate SystemCoordinate system
The Horizontal Coordinate SystemCoordinate system
The Supergalactic Coordinate SystemCoordinate system

Source references

The primary and reference sources this topic draws on.

  • IAUInternational Astronomical Union

    Official naming, definitions, constellation boundaries, and astronomical nomenclature.

  • US Naval ObservatoryUnited States Naval Observatory

    Precise time, almanac data, Sun/Moon rise-set, and phases.