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Lunar Gravity over Large Craters from Apollo 12 Tracking Data.

P Gottlieb, P M Muller, W L Sjogren

    Science (New York, N.Y.)
    |April 24, 1970
    PubMed
    Summary
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    Apollo 12 lunar module data reveal significant mass deficiencies beneath the Ptolemaeus and Albategnius craters. These findings suggest substantial material removal, impacting lunar gravity structure.

    Area of Science:

    • Lunar geology
    • Gravitational anomalies
    • Planetary science

    Background:

    • Understanding the Moon's subsurface structure is crucial for planetary evolution studies.
    • Apollo missions provided valuable data for lunar exploration.

    Purpose of the Study:

    • To analyze Doppler residuals from Apollo 12 lunar module tracking data.
    • To investigate gravitational anomalies over specific lunar craters.

    Main Methods:

    • Analysis of Doppler residuals from lunar module radio tracking.
    • Correlation of gravity fine structure with topographical features.

    Main Results:

    • Observed large negative accelerations over Ptolemaeus and Albategnius craters.
    • Inferred mass deficiencies equivalent to 1 km of material removal across crater areas.

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  • Identified correlations between gravity fine structure and topography.

    • Conclusions:

    • The lunar surface exhibits significant subsurface mass deficits.
    • Topography plays a role in the observed lunar gravity anomalies.
    • Further investigation into lunar subsurface composition is warranted.