right ascension

Noun

Meaning

(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

Source: WordNet

Synonyms

Ra celestial longitude radium azimuth altitude latitude declination re equinoctial longitude hour angle coordinates celestial longitude of aries equatorial coordinate equatorial hour angle
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Hypernyms

angular distance

Examples

one hour of right ascension equals fifteen degrees Source: Internet

Conjunction in right ascension and conjunction in ecliptic longitude do not normally take place at the same time, but in most cases nearly at the same time. Source: Internet

Bradley tested this using a star with a right ascension nearly exactly opposite to that of γ Draconis. Source: Internet

Computerized sources, on the other hand, are able to calculate the right ascension and declination of the "epoch of date" to the exact instant of observation. Source: Internet

Explanatory Supplement (1992), p. 724. Relation with the right ascension The local hour angle (LHA) of an object in the observer's sky is : (If result is negative, add 360 degrees. Source: Internet

Earth's sidereal day also differs from its rotation period relative to the background stars by the amount of precession in right ascension during one day (8.4 ms). Source: Internet

Close letter words and terms

right as a trivet right as ninepence right as rain right at the moment right at the time right atrial