Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p32b0555b&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #P32B-0555
Physics
6000 Planetology: Comets And Small Bodies, 6055 Surfaces And Interiors, 6205 Asteroids And Meteoroids
Scientific paper
The physical properties of regolith record processes important in the surface evolution of asteroids. For example, grain size is affected by the rates and style of cratering, and in turn affects spectral properties. In this study, we combine results acquired from the NEAR laser rangefinder (NLR) and the multispectral imager (MSI) to gain insight into physical characteristics of the regolith. By comparing the most recent NLR shape model to MSI albedo maps of Eros, we can determine the regional slope at which regolith fails. High albedos have been identified by the MSI team primarily in regions of steep slope, and attributed to exposure of the subsurface by mass-wasting processes. We determine the angles at which slope failure occurs by mapping individual NLR transects through high albedo regions visible in the MSI images, and use slope stability analyses to estimate the range of regolith grain sizes required to obtain failure at the observed angle. Preliminary results suggest that the regolith of Eros associated with these failures is coarse and possibly gravel-sized.
Barnouin-Jha Olivier Serge
Cheng Anqi
Murchie Scott
Robinson Michael
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