equatorial coordinates

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A system of coordinates that specifies the position of a celestial object relative to the celestial equator. The equatorial coordinate system is most commonly used for giving positions on the celestial sphere. The coordinates normally used are right ascension, the equivalent of longitude on Earth, and declination, the equivalent of terrestrial latitude. However, hour angle and polar distance may be used instead.

Subjects: Astronomy and Astrophysics.

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