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For example, the north ecliptic pole has a celestial latitude of 90°.Ecliptic latitude for "fixed stars" is not affected by precession.Commonly used in planetary orbit the intersection of the ecliptic of "date" with the true equator (that is, the mean equator plus nutation).This is the actual intersection of the two planes at any particular moment, with all motions accounted for.

It may be implemented in spherical or rectangular coordinates.From antiquity through the 18th century, ecliptic longitude was commonly measured using twelve zodiacal signs, each of 30° longitude, a practice that continues in modern astrology.The signs approximately corresponded to the constellations crossed by the ecliptic.Earth-centered ecliptic coordinates as seen from outside the celestial sphere.Ecliptic longitude (red) is measured along the ecliptic from the vernal equinox.

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