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Deviation of the Shape of Bennu from Rotational Figures of StabilityImages of asteroid (101955) Bennu acquired by the OSIRIS-­REx mission reveal a rocky world covered in rubble; Shape deviates from hydrostatic surface; Internal friction and/or cohesion even if no tensile strength; Understanding the deviation of the surface from idealized shape may help constrain mechanical properties of the interior; Geologic evolution of Bennu is driven by downslope migration of surface material and rubble; May be caused by YORP-induced spin-up, re-­accumulation, impact-induced seismic shaking, thermal stresses, or tidal disruption by close encounters to larger bodies.
Document ID
20190002404
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
Roberts, J. H. (Johns Hopkins Univ. Laurel, MD, United States)
Barnouin, O. S. (Johns Hopkins Univ. Laurel, MD, United States)
Johnson, C. L. (University of British Columbia Vancouver, British Columbia, Canada)
Daly, M. G. (York University Toronto, Ontario, Canada)
Perry, M. E. (Johns Hopkins Univ. Laurel, MD, United States)
Daly, R. T. (Johns Hopkins Univ. Laurel, MD, United States)
Asad, M. M. Al (University of British Columbia Vancouver, British Columbia, Canada)
Palmer, E. E. (Planetary Science Inst. Tucson, AZ, United States)
Weirich, J. R. (Planetary Science Inst. Tucson, AZ, United States)
Michel, P. (Observatoire de la Cote d'Azur Nice, France)
Bottke, W. F. (Southwest Research Inst. San Antonio, TX, United States)
Walsh, K. J. (Southwest Research Inst. San Antonio, TX, United States)
Nolan, M. C. (University of Arizona Tucson, AZ, United States)
Scheeres, D. J. (Colorado Univ. Boulder, CO, United States)
McMahon, J. W. (Colorado Univ. Boulder, CO, United States)
Neumann, G. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lauretta, D. S. (University of Arizona Tucson, AZ, United States)
Date Acquired
April 11, 2019
Publication Date
March 18, 2019
Subject Category
Lunar And Planetary Science And Exploration
Report/Patent Number
GSFC-E-DAA-TN66762
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: The Woodlands, TX
Country: United States
Start Date: March 18, 2019
End Date: March 22, 2019
Sponsors: Universities Space Research Association (USRA), NASA Johnson Space Center, Lunar and Planetary Institute (LPI)
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.

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