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Magnetic Properties of Asteroid (162173) Ryugu

Hercik, DavidORCIDiD
Auster, Hans-UlrichORCIDiD
Constantinescu, DragosORCIDiD
Blum, Jürgen
Fornaçon, Karl-Heinz
Fujimoto, Masaki
Gebauer, Kathrin
Grundmann, Jan-ThimoORCIDiD
Güttler, CarstenORCIDiD
Hillenmaier, Olaf
Ho, Tra-Mi
Hördt, AndreasORCIDiD
Krause, Christian
Kührt, Ekkehard
Lorda, Laurence
Matsuoka, AyakoORCIDiD
Motschmann, UweORCIDiD
Moussi-Soffys, Aurélie
Richter, IngoORCIDiD
Sasaki, KanameORCIDiD
Scholten, FrankORCIDiD
Stoll, Bernd
Weiss, Benjamin P.
Wolff, FriederikeORCIDiD
Glassmeier, Karl-HeinzORCIDiD
DOI: https://doi.org/10.1029/2019JE006035
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9475
Hercik, David; Auster, Hans-Ulrich; Constantinescu, Dragos; Blum, Jürgen; Fornaçon, Karl-Heinz; Fujimoto, Masaki; Gebauer, Kathrin; Grundmann, Jan-Thimo; Güttler, Carsten; Hillenmaier, Olaf; Ho, Tra-Mi; Hördt, Andreas; Krause, Christian; Kührt, Ekkehard; Lorda, Laurence; Matsuoka, Ayako; Motschmann, Uwe; Moussi-Soffys, Aurélie; Richter, Ingo; Sasaki, Kaname; Scholten, Frank; Stoll, Bernd; Weiss, Benjamin P.; Wolff, Friederike; Glassmeier, Karl-Heinz, 2020: Magnetic Properties of Asteroid (162173) Ryugu. In: Journal of Geophysical Research: Planets, Band 125, 1, DOI: 10.1029/2019JE006035.
 
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  • Abstract
Observations of the magnetization state of asteroids indicate diverse properties. Values between 1.9  × 10 −6 Am 2/kg (Eros) and 10 −2 Am 2/kg (Braille) have been reported. A more detailed understanding of asteroidal magnetic properties allows far-reaching conclusions of the magnetization mechanism as well as the strength of the magnetic field of the solar system regions the asteroid formed in. The Hayabusa2 mission with its lander Mobile Asteroid Surface Scout is equipped with a magnetometer experiment, MasMag. MasMag is a state-of-the-art three-axis fluxgate magnetometer, successfully operated also on Philae, the Rosetta mission lander. MasMag has enabled, after Eros for the second time ever, to determine the magnetic field of an asteroid during descent and on-surface operations. The new observations show that Ryugu, a low-albedo C-type asteroid, has no detectable global magnetization, and any local magnetization is either small ( <10−6 Am 2/kg) or on very small (subcentimeter) scales. This implies, for example, that energetic solar wind particles could reach and alter the surface unimpeded by strong asteroidal magnetic fields, such as minimagnetospheres in case of the Moon.
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  • Geophysik, Extraterrestische Forschung [848]
Subjects:
asteroids
magnetization
MASCOT
Hayabusa2
magnetic field
Ryugu
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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