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The Roughness and Albedo of 4 Vesta and Vestoids

Buratti, B. J. and Hicks, M. D. and Li, J. Y. and Blackburn, D. G. and Hillier, J. K. and Reddy, V. and Schroder, S. E. and Nathues, A. and Raymond, C. A. and Russell, C. T. and Mottola, Stefano and Roatsch, Thomas (2012) The Roughness and Albedo of 4 Vesta and Vestoids. DPS 2012, 14-21 Oct 2012, Reno, Nevada.

Full text not available from this repository.

Abstract

Dawn measurements of 4 Vesta represent the first detailed investigation of a V-type asteroid. When combined with ground-based observations of vestoids, which are believed to be fragments of Vesta, these data enable a comparison of the surface properties of this class of asteroid with other small bodies. Such comparisons have been made with two important photometric parameters: roughness and albedo. We find that the macroscopic roughness, which includes everything from large features such as craters, mountains, and ridges, down to small clumps of particles, differs for Vesta and vestoids. Vestoids are rougher than their parent body, and furthermore, Vesta appears to be smooth mainly at small size scales. This result suggests that small craters and clumps of particles are infilled with dust from ejecta which is kept on the surface by Vesta’s planet-like gravity. In addition, Vesta could accrete dust from its surroundings in the asteroid belt. Analysis of the global albedo of Vesta shows that the variegations on this body are far greater than any asteroid studied so far by a spacecraft. The albedo seems to be bifurcated into two distinct regimes. This bifurcation appears to be exogenous in origin.

Item URL in elib:https://elib.dlr.de/77249/
Document Type:Conference or Workshop Item (Speech)
Title:The Roughness and Albedo of 4 Vesta and Vestoids
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Buratti, B. J.NASA-JPLUNSPECIFIED
Hicks, M. D.NASA-JPLUNSPECIFIED
Li, J. Y.jyli (at) astro.umd.eduUNSPECIFIED
Blackburn, D. G.Univ. ArkansasUNSPECIFIED
Hillier, J. K.Grays Harbor CollegeUNSPECIFIED
Reddy, V.MPS LindauUNSPECIFIED
Schroder, S. E.MPS LindauUNSPECIFIED
Nathues, A.MPS LindauUNSPECIFIED
Raymond, C. A.Carol.A.Raymond (at) jpl.nasa.govUNSPECIFIED
Russell, C. T.UCLAUNSPECIFIED
Mottola, Stefanostefano.mottola (at) dlr.deUNSPECIFIED
Roatsch, Thomasthomas.roatsch (at) dlr.deUNSPECIFIED
Date:2012
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Keywords:Asteorids, Vesta, Dawn
Event Title:DPS 2012
Event Location:Reno, Nevada
Event Type:international Conference
Event Dates:14-21 Oct 2012
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Projekt DAWN (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Roatsch, Dr.rer.nat. Thomas
Deposited On:24 Oct 2012 08:13
Last Modified:24 Oct 2012 08:13

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