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.
For several objects in the solar system, the value of μ is known to greater accuracy than G or M. The SI units of the standard gravitational parameter are m3s−2.
Read more about Standard Gravitational Parameter: Small Body Orbiting A Central Body, Two Bodies Orbiting Each Other, Terminology and Accuracy
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