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Orbital Period (Kepler's Third Law) Calculator













How This Is Calculated


$$ T^2 = \frac{4 \pi^2 a^3}{GM} $$ where:

T   =   Orbital Period   (s)

a   =   Length of the semi-major axis   (m)

G   =   Gravitational Constant   (6.674 x 10-11 Nm2kg-2)

M   =   Mass of the central body   (kg)


Assumptions


  • The objects are treated as point masses.
  • The mass distribution of the objects are spherically symmertric.
  • The bodies are in stable circular or eliptical orbits.
  • The system is simplied to the interaction between two bodies.


Related Calculators


Delta-V for Hohmann Transfer Escape Velocity Hohmann Transfer Newton's Univeral Law of Gravitation Orbital Inclination