What Factors Control the Long Wavelength Shape of the Moon?

Details What Factors Control the Long Wavelength Shape of the Moon? What Factors Control the Long Wavelength Shape of the Moon?

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1511z&link_type=abstract

Lunar and Planetary Science, volume 27, page 1511

Physics

Geophysics

1

Evolution, Geophysics, Moon, Shape

Scientific paper

To first order the present shape of the Moon is a sphere with maximum positive and negative deviations of about 8 km, both occurring on the far side (160 degrees, 75 degrees S; 240 degrees E, -10 degrees N) in the areas of Korolev and S.P.-Aitken. These departures from a sphere are the combined result of various processes in the Moon's early history. The two largest global-scale features are the center of mass/center of figure (COM/COF) offset, for which various possible causes have been offered, and the polar flattening, probably due to an earlier rotation rate, both of which are of the order of 2 km. In addition there are smaller wavelength deviations, due primarily to impact basins.

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