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High Quality Content by WIKIPEDIA articles! In astrodynamics, the standard gravitational parameter of a celestial body is the product of the gravitational constant G and the mass M of the body. Note that the reduced mass is also denoted by mu.The value for the Earth is called the geocentric gravitational constant and equals 398,600.4418±0.0008 km3s 2. Thus the uncertainty is 1 to 500,000,000, much smaller than the uncertainties in G and M separately (1 to 7,000 each). The value for the Sun is called the heliocentric gravitational constant and equals 1.32712440018×1020 m3s 2.

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High Quality Content by WIKIPEDIA articles! In astrodynamics, the standard gravitational parameter of a celestial body is the product of the gravitational constant G and the mass M of the body. Note that the reduced mass is also denoted by mu.The value for the Earth is called the geocentric gravitational constant and equals 398,600.4418±0.0008 km3s 2. Thus the uncertainty is 1 to 500,000,000, much smaller than the uncertainties in G and M separately (1 to 7,000 each). The value for the Sun is called the heliocentric gravitational constant and equals 1.32712440018×1020 m3s 2.