A determination of the lunar moment of inertia

Details A determination of the lunar moment of inertia A determination of the lunar moment of inertia

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..353g&link_type=abstract

Geophysical Research Letters, vol. 2, Aug. 1975, p. 353-356.

Physics

5

Lunar Gravitation, Lunar Rotation, Moments Of Inertia, Orbital Elements, Spherical Harmonics, Error Analysis, Explorer 35 Satellite, Explorer 49 Satellite, Satellite Orbits

Scientific paper

An estimate of the second zonal coefficient of the spherical-harmonic representation of the lunar gravitational field has been obtained from an analysis of particular orbital-element variations of the Explorer 35 and Explorer 49 spacecraft. Data from these spacecraft were used because the orbital configurations resulted in variations of the longitude of periapse and node which were, to first order, dependent only on the even zonal harmonics. The data time span for each satellite was extremely long: 2138 days for Explorer 35 and 230 days for Explorer 49. The value of the harmonic coefficient is determined and used to obtain a value of the lunar moment of inertia.

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