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Variegation and space weathering on asteroid 21 Lutetia

Schröder, S.E. and Keller, H. U. and Mottola, S. and Scholten, F. and Preusker, Frank and Matz, K.-D. and Hviid, S. (2015) Variegation and space weathering on asteroid 21 Lutetia. Planetary and Space Science, 117, pp. 236-245. Elsevier. DOI: 10.1016/j.pss.2015.06.018 ISSN 0032-0633

[img] PDF (arXiv version)

Official URL: http://www.sciencedirect.com/science/article/pii/S0032063315001968


During the flyby in 2010, the OSIRIS camera on-board Rosetta acquired hundreds of high-resolution images of asteroid Lutetia's surface through a range of narrow-band filters. While Lutetia appears very bland in the visible wavelength range, Magrin et al. (2012) tentatively identified UV color variations in the Baetica cluster, a group of relatively young craters close to the north pole. As Lutetia remains a poorly understood asteroid, such color variations may provide clues to the nature of its surface. We take the color analysis one step further. First we orthorectify the images using a shape model and improved camera pointing, then apply a variety of techniques (photometric correction, principal component analysis) to the resulting color cubes. We characterize variegation in the Baetica crater cluster at high spatial resolution, identifying crater rays and small, fresh impact craters. We argue that at least some of the color variation is due to space weathering, which makes Lutetia's regolith redder and brighter.

Item URL in elib:https://elib.dlr.de/97132/
Document Type:Article
Title:Variegation and space weathering on asteroid 21 Lutetia
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schröder, S.E.stefanus.schroeder (at) dlr.deUNSPECIFIED
Keller, H. U.IGEP TU BraunschweigUNSPECIFIED
Mottola, S.stefano.mottola (at) dlr.deUNSPECIFIED
Scholten, F.frank.scholten (at) dlr.deUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Matz, K.-D.klaus-dieter.matz (at) dlr.deUNSPECIFIED
Hviid, S.stubbe.hviid (at) dlr.deUNSPECIFIED
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.pss.2015.06.018
Page Range:pp. 236-245
Keywords:Asteroid Lutetia; Spectrophotometry; Opposition effect; Space weathering
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 > Planetary Geology
Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Planetary Geodesy
Deposited By: Schröder, Dr. Stefan
Deposited On:04 Sep 2015 08:02
Last Modified:31 Jul 2019 19:53

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