NKPlanetPeriod:

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   Compute non-Kepler orbit periods from parameters in planetary radii.
   Has a demo for an Earth synchronoous orbit at 30 radii (9.6 days).
   The desired orbit rate is an input to NonKeplerianPlanet.

   Since version 7.
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   Form:
   [P,w] = NKPlanetPeriod( planet, radii )   % synchronous period
   [P,w] = NKPlanetPeriod( planet, rho, z )  % optimal period, sqrt(mu/r^3)
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   Inputs
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   planet    (:)       Planet name string
   radii    (1,1)      Radius of synchronous orbit period or rho
   z        (1,1)      Displacement of orbit in Earth radii

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   Outputs
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   P        (1,1)      Period (days)
   w        (1,1)      Orbit rate

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Children:

Common: Database/Constant