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Regolith depth, mobility, and variability on Vesta from Dawn's low altitude mapping orbit

Denevi, B. and Coman, E and Blewett, D. and Mittlefehldt, David W. and Buczkowski, D.L. and Combe, J. P. and De Sanctis, Maria Cristina and Jaumann, R. and Li, J. Y. and Marchi, S. and Nathues, A. and Petro, Noah E. and Pieters, Carle M. and Schenk, P. and Schmedemann, Nico and Schröder, S. and Sunshine, J.M. and Williams, D.A. and Raymond, C.A. and Russell, C.T. (2012) Regolith depth, mobility, and variability on Vesta from Dawn's low altitude mapping orbit. Lunar and Planetary Science Conference 2012, 19.-23. März 2012, The Woodlands, Texas, USA.

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Abstract

Regolith, the fragmental debris layer formed from impact events of all sizes, covers the surface of all asteroids imaged by spacecraft to date. Here we use Framing Camera (FC) images [1] acquired by the Dawn spacecraft [2] from its low-altitude mapping orbit (LAMO) of 210 km (pixel scales of ~20 m) to characterize regolith depth, variability, and mobility on Vesta, and to locate areas of especially thin regolith and exposures of competent material. These results will help to evaluate how the surface of this differentiated asteroid has evolved over time, and provide key contextual information for understanding the origin and degree of mixing of the surficial materials for which compositions are estimated [3,4] and the causes of the relative spectral immaturity of the surface [5]. Vestan regolith samples, in the form of howardite meteorites, can be studied in the laboratory to provide complementary constraints on the regolith process [6].

Item URL in elib:https://elib.dlr.de/76117/
Document Type:Conference or Workshop Item (Speech)
Title:Regolith depth, mobility, and variability on Vesta from Dawn's low altitude mapping orbit
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Denevi, B.Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd. Laurel, MD 20723-6099, USAUNSPECIFIED
Coman, EJohns Hopkins University Applied Physics Laboratory, Laurel, MD, USAUNSPECIFIED
Blewett, D.Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd. Laurel, MD 20723-6099, USAUNSPECIFIED
Mittlefehldt, David W.NASA, Johnson Space Center, mail code KR, 2101 NASA Parkway, Houston, TX 77058UNSPECIFIED
Buczkowski, D.L.Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd. Laurel, MD 20723-6099, USAUNSPECIFIED
Combe, J. P.Space Science Inst., Winthrop WA, USA, Lab. de Planetologie et de Geodynamique, U. de Nantes, Nantes, FranceUNSPECIFIED
De Sanctis, Maria CristinaIstituto Nazionale di Astrofisica, Rome, Italy.UNSPECIFIED
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Li, J. Y.University of Maryland, College Park, MD, USAUNSPECIFIED
Marchi, S.INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica,Via Fosso del Cavaliere 100, 00133 Rome, ItalyUNSPECIFIED
Nathues, A.Max-Planck Institute for Solar System Research, Katlenburg-Lindau, GermanyUNSPECIFIED
Petro, Noah E.NASA Goddard Space Flight Center, Greenbelt, MD, United States.UNSPECIFIED
Pieters, Carle M.Brown University, Providence, RI, United States.UNSPECIFIED
Schenk, P.Lunar and Planetary Institute, Houston, TX, USAUNSPECIFIED
Schmedemann, NicoInst. of Geosciences, Free University Berlin, GermanyUNSPECIFIED
Schröder, S.Institute for Solar System Research, Max-Planck Str. 2, 37191 Katlenburg-Lindau, GermanyUNSPECIFIED
Sunshine, J.M.Department of Geological Sciences, Brown University, Providence, RI, USAUNSPECIFIED
Williams, D.A.Department of Geology, Arizona State University, Tempe, AZ, USAUNSPECIFIED
Raymond, C.A.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USAUNSPECIFIED
Russell, C.T.Institute of Geophysics, University of California, Los Angeles, Los Angeles, CA 90095UNSPECIFIED
Date:2012
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Dawn, Vesta, asteroids
Event Title:Lunar and Planetary Science Conference 2012
Event Location:The Woodlands, Texas, USA
Event Type:international Conference
Event Dates:19.-23. März 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt DAWN
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Pieth, Susanne
Deposited On:19 Sep 2012 09:56
Last Modified:31 Jul 2019 19:36

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