BabelNet

bn:00017012n

Noun Concept

Categories: Angle, Celestial coordinate system

right ascension RA celestial longitude Right assension Right assention

(astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere WordNet 3.0

Definitions

Examples

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Right ascension is the angular distance of a particular point measured eastward along the celestial equator from the Sun at the March equinox to the point in question above the earth. Wikipedia

The astronomical unit of measure of angle Wikipedia Disambiguation

Astronomical equivalent of longitude Wikidata

The angular distance east of the vernal point (“the solar zenith at the March equinox”); the celestial equivalent of longitude. Wiktionary

Angular distance. Wiktionary (translation)

One hour of right ascension equals fifteen degrees WordNet 3.0 & Open English WordNet

IS A

angular distance

PART OF

equatorial coordinate system

ephemeris

second equatorial coordinate system

CATEGORY DOMAIN