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Home > Terms > English, UK (UE) > Constant of diurnal aberration
Constant of diurnal aberration
The largest amount, theoretically, by which a star's apparent direction varies, as seen from a fixed latitude, during one day solely because of the Earth's rotation. It is commonly denoted by k and is given by the formula k = (2πR cos φ')/cT , in which R is the radius of the Earth at the observer's geocentric latitude φ', T is the length of the sidereal day and c is the speed of light.
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- Category: Mapping science
- Company: American Congress on Surveying & Mapping
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