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VLT/SPHERE observations and shape reconstruction of asteroid (6) Hebe
Marsset, Michael; Carry, Benoit; Dumas, Christophe et al.
2016In AAS/Division for Planetary Sciences Meeting Abstracts
 

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Abstract :
[en] (6) Hebe is a large main-belt asteroid, accounting for about half a percent of the mass of the asteroid belt. Its spectral characteristics and close proximity to dynamical resonances within the main-belt (the 3:1 Kirkwood gap and the nu6 resonance) make it a probable parent body of the H-chondrites and IIE iron meteorites found on Earth.We present new AO images of Hebe obtained with the high-contrast imager SPHERE (Beuzit et al. 2008) as part of the science verification of the instrument. Hebe was observed close to its opposition date and throughout its rotation in order to derive its 3-D shape, and to allow a study of its surface craters. Our observations reveal impact zones that witness a severe collisional disruption for this asteroid. When combined to previous AO images and available lightcurves (both from the literature and from recent optical observations by our team), these new observations allow us to derive a reliable shape model using our KOALA algorithm (Carry et al. 2010). We further derive an estimate of Hebe's density based on its known astrometric mass.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Marsset, Michael;  Aix-Marseille Université
Carry, Benoit;  Observatoire de la Côte d'Azur
Dumas, Christophe;  Thirty Meter Telescope
Vernazza, Pierre;  Aix-Marseille Université
Jehin, Emmanuel  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Sonnett, Sarah M.;  Jet Propulsion Laboratory
Fusco, Thierry;  Aix-Marseille Université)
Language :
English
Title :
VLT/SPHERE observations and shape reconstruction of asteroid (6) Hebe
Publication date :
01 October 2016
Event name :
DPS meeting #48
Event organizer :
American Astronomical Society
Event place :
Pasadena, United States
Event date :
21-26 October 2016
Audience :
International
Main work title :
AAS/Division for Planetary Sciences Meeting Abstracts
Pages :
510.03
Commentary :
48
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