Kepler's Third Law Calculator

Planet Mass:
Satellite Mean Orbital Radius:
Satellite Orbit Period:



Kepler's Third Law formula:
  2 × r3 = G × m × T2
where:
T: Satellite Orbit Period, in s
r: Satellite Mean Orbit Radius, in m
m: Planet Mass, in Kg
G: Universal Gravitational Constant, 6.6726 × 10-11 N.m2/Kg2

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