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Images of Asteroid 21 Lutetia: A Remnant Planetesimal from the Early Solar System

Sierks, H. and Lamy, P. and Barbieri, C. and Koschny, D. and Rickman, H. and Rodrigo, R. and A'Hearn, M. and Angrilli, F. and Barucci, Antonella and Bertaux, J.-L. and Bertini, I. and Besse, S. and Carry, B and Cremonese, Gabriele and da Deppo, V. and Davidsson, B. and Debei, S. and De Cecco, M. and De Leon, J. and Ferri, F. and Fornasier, Sonia and Fulle, M. and Hviid, S. and Gaskell, Robert W. and Groussin, Olivier and Gutierrez, P.J. and Ip, W.-H. and Jorda, L and Kaasalainen, M. and Keller, H. U. and Knollenberg, J. and Kramm, R. and Kührt, Ekkehard and Küppers, Michael and Lara, Luisa M. and Lazzarin, M. and Leyrat, C. and Moreno, J.J. and Magrin, S. and Marchi, S. and Marzari, F. and Massironi, Matteo and Michalik, H. and Moissl, R. and Naletto, G. and Preusker, Frank and Sabau, L. and Sabolo, W. and Scholten, Frank and Snodgrass, C. and Thomas, N. and Tubiana, C. and Vernazza, P and Vincent, J.B. and Wenzel, K.-P. and Andert, T. and Pätzold, M and Weiss, B.P. (2011) Images of Asteroid 21 Lutetia: A Remnant Planetesimal from the Early Solar System. Science, 334 (6055), pp. 487-490. DOI: 10.1126/science.1207325.

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Images obtained by the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) cameras onboard the Rosetta spacecraft reveal that asteroid 21 Lutetia has a complex geology and one of the highest asteroid densities measured so far, 3.4 ± 0.3 grams per cubic centimeter. The north pole region is covered by a thick layer of regolith, which is seen to flow in major landslides associated with albedo variation. Its geologically complex surface, ancient surface age, and high density suggest that Lutetia is most likely a primordial planetesimal. This contrasts with smaller asteroids visited by previous spacecraft, which are probably shattered bodies, fragments of larger parents, or reaccumulated rubble piles.

Document Type:Article
Title:Images of Asteroid 21 Lutetia: A Remnant Planetesimal from the Early Solar System
AuthorsInstitution or Email of Authors
Sierks, H.MPS
Lamy, P.Laboratoire d'Astronomie Spatiale, Marseille, France
Barbieri, C.University of Padova, Department of Astronomy
Koschny, D. European Space Agency (ESA), 2201 Noordwijk, Netherlands),
Rickman, H. Department of Physics and Astronomy, Uppsala University, 75120 Uppsala, Sweden
Rodrigo, R.CSIC
A'Hearn, M.U. Maryland
Angrilli, F.CISAS
Barucci, AntonellaObservatoire de Paris-Meudon, France
Bertaux, J.-L.Laboratoire Atmosphères, Milieux, Observations Spatiales, CNRS/UVSQ/UPMC, 11 boulevard d’Alembert, 78280 Guyancourt, France
Bertini, I.AC(University of Padova, Department of Astronomy
Besse, S.Instituto de Astrofifica de Andalucia-Consejo Superior de Investigaciones Cientificas, Granada, Spain
Carry, BObservatoire de Paris
Cremonese, GabrieleINAF, Padova, I
da Deppo, V.CISAS; INAF
Davidsson, B.Astronomiska observatoriet, Uppsala, Sweden
Debei, S.Università di Padova, Center of Studies and Activities of Space (CISAS) "G.Colombo", Padova, Italy
De Cecco, M.Università di Padova, Center of Studies and Activities of Space (CISAS) "G.Colombo", Padova, Italy
De Leon, J.University of Padova, Department of Astronomy
Ferri, F.University of Padova, Padova, Italy
Fornasier, SoniaObservatoire de Paris-Meudon, France
Fulle, M.INAF - Osservatorio Astronomico di Trieste, Trieste, Italy
Hviid, S. MPS
Gaskell, Robert W.Planetary Science Institute
Groussin, OlivierLab. d'Astrophysique de Marseille, France
Gutierrez, P.J.IAA-CSIC, Granada, Spain
Ip, W.-H.Institute for Space Science, National Central University, 32054 Chung-Li, Taiwan
Jorda, LLAM, Marseille
Kaasalainen, M.Rolf Nevanlinna Institute, Helsinki, Finland
Keller, H. U.Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau
Knollenberg, J.joerg.knollenberg@dlr.de
Kramm, R.MPS
Kührt, Ekkehardekkehard.kuehrt@dlr.de
Küppers, MichaelMax-Planck-Institut für Sonnensystemforschung
Lara, Luisa M.IAA-CSIC Granada, Spain
Lazzarin, M.Department of Astronomy, University of Padua
Leyrat, C.Università di Padova, Via Venezia 15, 35131 Padova, Italy)
Moreno, J.J.Instituto de Astrofísica de Andalucía, Consejo Superior de Investigationes Cientificas (CSIC), 18080 Granada, Spain
Magrin, S.Lab. d'Astrophysique de Marseille, France
Marchi, S.Department of Astronomy, University of Padua
Marzari, F.Università di Padova, Departimento di Fisica, Padova, Italy
Massironi, MatteoINAF, Padova, I
Michalik, H.IDA
Moissl, R.Max-Planck-Institut für Sonnensystemforschung, D-37191 Katlenburg-Lindau, Germany
Naletto, G.Università di Padova, Departimento di Elettronica et Informatica, Padova, Italy
Preusker, Frankfrank.preusker@dlr.de
Sabau, L.Instituto Nacional de Técnica Aérospacial, Torrejon de Ardoz, Spain
Sabolo, W.Instituto de Astrofifica de Andalucia-Consejo Superior de Investigaciones Cientificas, Granada, Spain
Scholten, Frankfrank.scholten@dlr.de
Snodgrass, C.Queen's University, Belfast, UK
Thomas, N.Physikalisches Institut der Universität Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
Tubiana, C.Max-Planck-Institut fuer Sonnensystemforschung, Germany
Vernazza, PESA
Vincent, J.B.Max-Planck-Institut fuer Sonnensystemforschung, Germany
Wenzel, K.-P.European Space and Technology Centre, Noordwijk, Netherlands
Andert, T.Institut für Raumfahrttechnik, Universität der Bundeswehr München, Neubiberg, Germany
Pätzold, MUniversität Köln
Weiss, B.P.Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
Date:1 October 2011
Journal or Publication Title:Science
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 487-490
Keywords:Asteroids, rubble piles
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 ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Dr.rer.nat. Jörg Knollenberg
Deposited On:10 Jan 2012 09:40
Last Modified:04 Apr 2013 16:34

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