Astrophysics (index)about

Standard Gravitational Parameter

(a body's mass times the gravitational constant)

The Standard Gravitational Parameter (μ) of a body is its mass times the Gravitational Constant, 6.673x10-11 N(m/kg)2 (Newtons times meters squared over kilograms squared).

μ = GM

It serves as short-hand for the many formulae that use GM. Examples:

  • Sun (aka Heliocentric Gravitational Constant): 132712440018 km3s-2
  • Earth (aka Geocentric Gravitational Constant): 398600.4418 km3s-2
  • Moon: 4902.8000 km3s-2


Referenced by:
Semi-Major Axis (a)