©ULTRAMARIN
nl uurhoek   sferische hoek aan de hemelpool gerekend vanaf het snijpunt van de hemelequator met de nulde uurcirkel tot het snijpunt met de uurcirkel door de ster;
de Stundenwinkel
Zeitwinkel
sphärischer Winkel am Himmelspol gerechnet vom Schnittpunkt des Himmelsäquators mit dem nullten Stundenkreis bis zum Schnittpunkt mit dem Stundenkreis durch das Gestirn;
en hour angle one of the co-ordinates used in the equatorial co-ordinate system for describing the position of a point on the celestial sphere. The hour angle of a point is the angle between the half plane determined by the Earth axis and the zenith (half of the meridian plane) and the half plane determined by the Earth axis and the given point. The angle is taken with minus sign if the point is eastward of the meridian plane and with the plus sign if the point is westward of the meridian plane. It must be paired with the declination in order to fully specify the position of a point on the celestial sphere as seen by the observer at a given time. The hour angle is usually expressed in time units, with 24 hours corresponding to 360°.
fr angle horaire  
es    
it angolo orario