Apparent Position
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Apparent Position
The position on the
celestial sphere at which a heavenly
body (or a space vehicle) would be seen from the center of the
earth at a particular time. Compare
astrometric position.
The apparent position of a body is displaced from the true position
at the time of observation by the motion of the body during the
time it takes light to travel from the body to the earth (see
planetary aberration) and by
aberration.
Most ephemerides
tabulate apparent position of the sun, moon, and planets.
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use