I want to compute the precession of the Moon's orbital plane, sometimes called as the precession of nodes.(adsbygoogle = window.adsbygoogle || []).push({});

I assume simple harmonic motion;

the Moon orbit lies in a plane X-Y, so it oscillates along z:

z'' = -kz

By definition k = w^2; and we know already: w = 2pi/18.6y; because the period of precession is 18.6 years.

Therefore: k = (2pi/18.6)^2 = 0.114 1/y^2 = 1.146e-16 1/s^2

But what is this number?

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# Moon's orbit precession

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