Gaussian gravitational constant
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Gaussian gravitational constant(gowss -ee-ăn) Symbol: k . A constant equal in value to
0.017 202 098 95
n 2a 3 = k 2(1 + m )n is the mean motion of a planet in radians per day, a is the semimajor axis of its orbit in astronomical units, and m is its mass in terms of solar mass. The dimensions of k 2 are those of Newton's gravitational constant.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006