Invariable plane

Inclination to the invariable plane for the giant planets
Year Jupiter Saturn Uranus Neptune
2009 0.32° 0.93° 1.02° 0.72°
142400 0.48° 0.79° 1.04° 0.55°
168000 0.23° 1.01° 1.12° 0.55°

The invariable plane of a planetary system, also called Laplace's invariable plane, is the plane passing through its barycenter (center of mass) perpendicular to its angular momentum vector.

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