celestial longitude

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celestial longitude [n]

(astronomy) the angular distance eastward along the celestial equator from the vernal equinox to the intersection of the hour circle that passes through the body; expressed in hours and minutes and second; used with declination to specify positions on the celestial sphere; "one hour of right ascension equals fifteen degrees"

Synonyms :

ra right_ascension

See Also:

angular_distance astronomy

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