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Soil Mechanics

NSSDCA ID: 1969-099C-10

Mission Name: Apollo 12 Lunar Module / ALSEP
Principal Investigator:Prof. James K. Mitchell


The purpose of this expeirment was to determine the mechanical properties of the lunar surface at the landing site in Oceanus Procellarum, at the site of Surveyor III. These properties were measured by the cohesion, porosity, particle size, density, coefficient of friction, packing characteristics, and friction angle of the soil or surface material. Data were obtained from real-time observations of TV, photographs, spacecraft behavior telemetry at landing, and experiments on returned soil samples.

Alternate Names

  • Apollo12ALSEP/SoilMechanics
  • S200

Facts in Brief

Mass: 0.27 kg

Funding Agency

  • NASA-Office of Manned Space Flight (United States)


  • Planetary Science: Geology and Geophysics

Additional Information

Questions and comments about this experiment can be directed to: Dr. David R. Williams



NameRoleOriginal AffiliationE-mail
Mr. D. CarrierOther InvestigatorNASA Johnson Space Center
Mr. Nicholas C. CostesOther InvestigatorNASA Johnson Space Center
Dr. Leilie G. BromwellOther InvestigatorMassachusetts Institute of
Prof. James K. MitchellPrincipal InvestigatorUniversity of California, Berkeley

Selected References

  • Scott, R. F., et al., Preliminary geologic investigation of the Apollo 12 landing site. Part C - Mechanical properties of the lunar regolith, in Apollo 12 Preliminary Science Report, NASA SP-235, 161-182, Wash., DC, 1970.
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