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Compositional Mapping of the Av-4 Domitia Quadrangle of Asteroid 4 Vesta

Denevi, B. and Jaumann, R. and Longobardo, A and Toplis, M. and Scully, J. and Ammannito, E. and De Sanctis, M.C. and Capaccioni, F. and Palomba, E. and Tosi, F. and Zambon, F. and Nathues, A. and Le Corre, L. and Reddy, V. and Stephan, K. and Preusker, Frank (2012) Compositional Mapping of the Av-4 Domitia Quadrangle of Asteroid 4 Vesta. In: Copernicus. EGU 2012, 22.04-27.04.2012, Wien, Österreich.

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Abstract

The Dawn spacecraft is currently orbiting 4 Vesta, returning data about the geology, composition, shape, and internal structure of this differentiated asteroid. Here we present compositional interpretations for the Av-4 Domitia quadrangle, one of the 15 quadrangles currently being mapped in terms of both geology and mineralogy by the Dawn Team. The maps are based on data acquired by Dawn's Framing Camera (FC) and Visible and Infrared Mapping Spectrometer (VIR-MS). The FC images the surface through one broadband clear filter and seven narrow-band filters from 0.44 to 0.98 µm at pixel scales of ~250 meters from Dawn's survey orbit and less than 20 meters from its low-altitude mapping orbit (LAMO). VIR-MS maps the surface in more than 850 spectral channels from 0.25 to 5.1 µm with pixel scales from 800 meters in the survey orbit to ~50 meters from LAMO. The Av-4 Domitia quadrangle covers the region from 21-66° N and 180-270° E. It is currently winter in the northern hemisphere of Vesta, and only the southern ~half of this quadrangle has been in sunlight since Dawn's arrival. The portion viewed thus far is part of Vesta's Northern Heavily Cratered Terrain that includes a NW-SE trending trough system, and exposures of dark material. The current illumination conditions (high incidence angles) are not ideal for interpreting spectral reflectance data, and much of the variation in band depth and center is thus far related to variations in incidence angle. However, some regional trends are evident. Absorption bands are generally similar to the global average; band centers are intermediate and appear to increase toward the east, consistent with a mixed-Eucritic composition. The authors acknowledge the support of the Dawn Science, Instrument and Operations Teams. This work was supported by the NASA Dawn Project under contract from UCLA and by the NASA Dawn at Vesta Participating Scientist program.

Item URL in elib:https://elib.dlr.de/80574/
Document Type:Conference or Workshop Item (UNSPECIFIED)
Title:Compositional Mapping of the Av-4 Domitia Quadrangle of Asteroid 4 Vesta
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
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Longobardo, AINAF-LAPS, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUNSPECIFIED
Toplis, M.University of Toulouse, FranceUNSPECIFIED
Scully, J.UCLA, Institute of Geophysics, Los Angeles, CA 90095-1567, USAUNSPECIFIED
Ammannito, E.INAF, Istituto di Fisica Dello Spazio Interplanetario, Roma, ItalyUNSPECIFIED
De Sanctis, M.C.Istituto Nazionale di Astrofisica, Rome, Italy.UNSPECIFIED
Capaccioni, F.INAF-IASF, italyUNSPECIFIED
Palomba, E.Institute for Interplanetary Space Physics - INAF, Rome, ItalyUNSPECIFIED
Tosi, F.INAF-IASF Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma ItalyUNSPECIFIED
Zambon, F.INAF-IAPS, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUNSPECIFIED
Nathues, A.Max-Planck Institute for Solar System Research, Katlenburg-Lindau, GermanyUNSPECIFIED
Le Corre, L.Max Planck Institute for Solar System Research, Max-Planck-Str. 2, Katlenburg-Lindau, 37191, GermanyUNSPECIFIED
Reddy, V.Department of Space Studies, University of North Dakota, Grand Forks, ND 58202, USAUNSPECIFIED
Stephan, K.katrin.stephan (at) dlr.deUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Date:April 2012
Journal or Publication Title:Copernicus
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Vesta, Dawn
Event Title:EGU 2012
Event Location:Wien, Österreich
Event Type:international Conference
Event Dates:22.04-27.04.2012
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: Aydin, Zeynep
Deposited On:14 Jan 2013 07:32
Last Modified:01 Dec 2018 19:48

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