right ascension

Noun	1.	right ascension - (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: celestial longitude, RA
	2.	right ascension - an arc of the celestial equator eastward from the vernal equinox

angular distance, astronomy, celestial longitude, RA, uranology