hour angle meaning and definition

HOUR ANGLE noun

Definition of hour angle (noun)

1. the angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body
2. (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