The earth's equatorial principal axes and moments of inertia

Details The earth's equatorial principal axes and moments of inertia The earth's equatorial principal axes and moments of inertia

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991geoji.106..699l&link_type=abstract

Geophysical Journal International (ISSN 0955-419X), vol. 106, Sept. 1991, p. 699-702.

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Earth Axis, Earth Rotation, Moments Of Inertia, Axes Of Rotation, Equatorial Regions, Gravitational Fields

Scientific paper

The earth's equatorial principal moments of inertia are given as A and B, where A is less than B, and the corresponding principal axes are given as a and b. Explicit formulas are derived for determining the orientation of a and b axes and the difference B - A using C(22) and S(22), the two gravitational harmonic coefficients of degree 2 and order 2. For the earth, the a axis lies along the (14.93 deg W, 165.07 deg E) diameter, and the b axis lies perpendicular to it along the (75.07 deg E, 104.93 deg W) diameter. The difference B - A is 7.260 x 10 to the -6th MR2. These quantities for other planets are contrasted, and geophysical implications are discussed.

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