# Standard Gravitational Parameter - Two bodies orbiting each other

## Description

In celestial mechanics, the standard gravitational parameter μ of a celestial body is the product of the gravitational constant G and the mass M of the body.

In the case of two bodies orbiting each other the mass M is the sum of the masses of the two bodies.

For several objects in the solar system, the value of μ is known to greater accuracy than either G or M.

## Variables

μ | standard gravitational parameter (m^{3}/s^{2}) |

G | Newtonian constant of gravitation |

m_{1} | mass of 1st body (kg) |

m_{2} | mass of 2nd body (kg) |