elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Hydrocode simulations of the largest crater on asteroid Lutetia

Cremonese, G. and Martellato, E. and Marzari, F. and Kührt, E. and Scholten, F. and Preusker, F. and Wünnemann, K. and Borin, P. and Massironi, M. and Simoni, E. and Ip, W-H. and OSIRIS , team (2012) Hydrocode simulations of the largest crater on asteroid Lutetia. Planetary and Space Science, 66 (1), pp. 147-154. Elsevier. DOI: 10.1016/j.pss.2012.01.001.

Full text not available from this repository.

Abstract

The flyby of the Main Belt asteroid Lutetia by the Rosetta spacecraft allows the camera OSIRIS to obtain very good images of about half of the body at the maximum resolution of 60 m per pixel. From the images and radio-science experiment, a density of about (3.4±0.3) g/cm3 has been inferred for the asteroid. Many impact craters have been observed on the surface of Lutetia and the largest, named Massilia, has a diameter of about 55 km. Relative to the size of Lutetia (the longest axis is approximately 126 km) the crater represents one of the dominating features on its surface. Whether or not the impact that formed Massilia affected the entire asteroid can be only evaluated via numerical modeling, with hydrocodes, of the impact process. The results of a suite of iSALE simulations are compared with the crater profile derived from the Digital Terrain Model of the observed surface. The best match to the DTM of the crater with hydrocode simulations has allowed to determine a value of 7.5 km for the impactor diameter, which suggests a primordial origin of Lutetia due to the low probability of such an impact event. A second interesting impact structure has been identified nearby Massilia within the North Pole Crater Cluster. The crater has a diameter of 24 km and it lies over a larger crater of the North Pole Crater Cluster. This is strongly suggestive of a very young structure on Lutetia. The numerical simulations of this feature constrain the impactor to be 3.8 km in diameter, assuming the same material properties for target and impactor as in the model of the formation of Massilia.

Document Type:Article
Title:Hydrocode simulations of the largest crater on asteroid Lutetia
Authors:
AuthorsInstitution or Email of Authors
Cremonese, G.INAF-Osservatorio Astronomico, Padova, Italy
Martellato, E.Univ. di Padova, Italy
Marzari, F.INAF-Osservatorio Astronomico, Padova, Italy
Kührt, E.ekkehard.kuehrt@dlr.de
Scholten, F.frank.scholten@dlr.de
Preusker, F.frank.preusker@dlr.de
Wünnemann, K.Museum für Naturkunde, Leibnitz Institute for Research on Evolution and Biodiversity at the Humboldt University, Berlin, Germany
Borin, P. INAF-Osservatorio Astronomico, Padova, Italy
Massironi, M.Department of Geosciences, University of Padova, Italy
Simoni, E.CNR-IFN UOS Luxor, Padova, Italy
Ip, W-H.Institute for Space Science, National Central University, Chung Li, Taiwan
OSIRIS , teamUNSPECIFIED
Date:2012
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:66
DOI:10.1016/j.pss.2012.01.001
Page Range:pp. 147-154
Publisher:Elsevier
Status:Published
Keywords: Lutetia; Asteroids; Impacts; Numerical modeling; Cratering; Rosetta
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: Laura-Maria Brumm
Deposited On:21 Nov 2012 09:51
Last Modified:04 Apr 2013 16:40

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.