ultramarin marine translations |
ultramarin.online | ||||
parallax | het verschil tussen de schijnbare
richting van een object, vanuit verschillende posities gezien; hoek waaronder vanaf de ster de radius (straal) van de aarde verschijnt. Het is de hoek aan de ster tussen de lijnen: middelpunt van de stermiddelpunt van de aarde, en middelpunt van de sterbeschouwer. |
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Parallaxe | der Unterschied der scheinbaren Richtung
eines Gegenstands, aus unterschiedlichen Richtungen betrachtet. Winkel, unter dem vom Gestirn aus der Erdhalbmesser erscheint. Das ist der Winkel am Gestirn zwischen den Linien GestirnmittelpunktErdmittelpunkt und GestirnsmittelpunktBeobachter. |
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parallax | the difference in apparent direction
or position of an object when viewed from different points. geocentric parallax: for bodies of the solar system, parallax is the difference in the direction of the body due to the displacement of the observer from the center of the earth, varying with the body’s altitude and distance from the earth. horizontal parallax: the geocentric parallel when a body is in the horizon; parallax in altitude: the parallax at any altitude; lunar parallax: the parallax of the moon; heliocentric/stellar parallax: the parallax for stars or the angle at the star subtended by the semimajor axis of the earth’s orbit. This is too small to be significant as a sextant error. In marine navigation it is customary to apply a parallax correction to sextant altitudes of the sun, moon, Venus, and Mars. |
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parallaxe | ||||
paralaje | ||||
parallasse |