## anomalyAn angle that gives the position of an object in an elliptical orbit at any given time. The true anomaly is the angle
between the periapsis of an orbit and
the object's current orbital position, measured from the body being orbited
and in the direction of orbital motion. The mean anomaly
is what the true anomaly would be if the object orbited in a perfect circle
at constant speed. The mean anomaly is 0° at periapsis and 180°
at apoapsis, just as for the true anomaly, but at other points along the
orbit the values of the mean and true anomalies differ. The mean anomaly
at a given time is often used as an orbital element. The eccentric
anomaly is an angle related to both the true anomaly and the mean
anomaly that is encountered when solving Kepler's
equation. ## Related category• CELESTIAL MECHANICS | |||||

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