What does Hour Angle mean?

Hour Angle in AZ Dictionary

(n) The angular length, sized westward across the celestial equator, between the celestial meridian associated with the observer plus the hour-circle passing through a celestial body.
(n) the angle between the hour circle passing through a given body, and the meridian of a place.
(n) the angular distance along the celestial equator from the observer's meridian into the hour circle of a given celestial human body

Hour Angle in Astronomy Dictionary

the telescope based coordinate specifying the angle, inside equatorial jet, from the meridian to a plane containing the celestial item as well as the north and south celestial poles. by Ka DeansReport definition

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