Lunar gravity - A mass point model

Details Lunar gravity - A mass point model Lunar gravity - A mass point model

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.3049a&link_type=abstract

Journal of Geophysical Research, vol. 82, July 10, 1977, p. 3049-3064.

Astronomy and Astrophysics

Astronomy

4

Astronomical Models, Gravity Anomalies, Lunar Gravitation, Mascons, Mass Distribution, Apollo 15 Flight, Apollo 16 Flight, Gravimetry, Lunar Far Side, Lunar Orbiter 5

Scientific paper

A point-mass representation of a quasi-global lunar gravity field is developed by processing Apollo 15 and 16 subsatellite and Lunar Orbiter 5 Doppler tracking data. The model is generated by reducing the long-period variations in the mean orbital elements. The model consists of 117 point masses distributed over the region of + or - 30 deg in latitude about the lunar equator and resolves all the previously known 'mascons' on the near side as broad positive-gravity regions. The near-side acceleration map evaluated at 100 km above the lunar surface shows good agreement with line-of-sight acceleration results. The lunar far-side gravity map shows strong broad positive-gravity regions for the highland areas. However, all the major ringed basins are resolved as localized negative anomalies in contrast with the near-side basins. This model does not indicate any evidence for the existence of any mascon-type feature on the lunar far-side.

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