Noun
(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: WordNetone 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