hour angle

Noun	1.	hour angle - the angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body
	2.	hour angle - (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day Synonyms: HA

angular distance, astronomy, HA, uranology