ultramarin.online |
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uurhoek |
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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; |
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Stundenwinkel
Zeitwinkel |
sphärischer Winkel am Himmelspol
gerechnet vom Schnittpunkt des Himmelsäquators
mit dem nullten Stundenkreis bis zum Schnittpunkt mit dem Stundenkreis
durch das Gestirn; |
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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°. |
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angle horaire |
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ángulo horario |
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angolo orario |
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