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Equinox (celestial coordinates)

In astronomy, an equinox is either of two places on the celestial sphere at which the ecliptic intersects the celestial equator. Although there are two such intersections, the equinox associated with the Sun's ascending node is used as the conventional origin of celestial coordinate systems and referred to simply as "the equinox". In contrast to the…

Standards, Equinoxes and epochs & Overview

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Overview

Motion of the equinox

Equinoxes and epochs

Sidereal time and the equation of the equinoxes

Diminishing role of the equinox in astronomy

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Equinox (celestial coordinates)

Nodes59
Edges58
Triples3
Avg. degree1.97
Density0.033898
Components1

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Important terminology

equinox epoch celestial used julian equinoxes date j2000 time besselian epochs reference system coordinate ecliptic precession nutation standard equator 25

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
orbitalinstance ofAstronomical objects show real movements0.80text
proper motionsinstance ofAstronomical objects show real movements0.80text
and the epoch defines the date for which the position of an object appliesinstance ofAstronomical objects show real movements0.80text

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