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Magnetic Properties of Asteroid (162173) Ryugu

Hercik, D. and Auster, H-U. and Constantinescu, D. and Blum, J. and Fornacon, K.H. and Fujimoto, M. and Gebauer, K. and Grundmann, J. T. and Güttler, C. and Hillenmaier, O. and Ho, T.-M. and Hördt, A. and Krause, C. and Kührt, E. and Lorda, L. and Matsuoka, A. and Motschmann, U. and Moussi-Soffys, A. and Richter, I. and Sasaki, K. and Scholten, F. and Stoll, B. and Weiss, B. P. and Wolff, Friederike and Glassmeier, K. H. (2020) Magnetic Properties of Asteroid (162173) Ryugu. Journal of Geophysical Research: Planets, 125. Wiley. doi: 10.1029/2019JE006035. ISSN 2169-9097.

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Abstract

Observations of the magnetization state of asteroids indicate diverse properties. Values between 1.9 × 10−6 Am2/kg (Eros) and 10−2Am2/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 Am2/kg) or on very small (subcentimeter) scales. Thisimplies, 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.

Item URL in elib:https://elib.dlr.de/135579/
Document Type:Article
Title:Magnetic Properties of Asteroid (162173) Ryugu
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hercik, D.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Auster, H-U.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Constantinescu, D.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Blum, J.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Fornacon, K.H.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Fujimoto, M.JAXA/ISAS, JapanUNSPECIFIEDUNSPECIFIED
Gebauer, K.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Grundmann, J. T.German Aerospace Center (DLR), Institute of Space SystemsUNSPECIFIEDUNSPECIFIED
Güttler, C.Max-Planck Institut für Sonnensystemforschung, Goettingen, GermanyUNSPECIFIEDUNSPECIFIED
Hillenmaier, O.Magson GmbH, Berlin, Germany,UNSPECIFIEDUNSPECIFIED
Ho, T.-M.UNSPECIFIEDhttps://orcid.org/0000-0003-3378-3227148027977
Hördt, A.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Krause, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kührt, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lorda, L.CNES, ToulouseUNSPECIFIEDUNSPECIFIED
Matsuoka, A.ISAS/JAXA, JapanUNSPECIFIEDUNSPECIFIED
Motschmann, U.DLR and TU BraunschweigUNSPECIFIEDUNSPECIFIED
Moussi-Soffys, A.CNES, ToulouseUNSPECIFIEDUNSPECIFIED
Richter, I.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Sasaki, K.UNSPECIFIEDhttps://orcid.org/0000-0003-0365-4539UNSPECIFIED
Scholten, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stoll, B.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Weiss, B. P.Massachusetts Institute of TechnologyUNSPECIFIEDUNSPECIFIED
Wolff, FriederikeUNSPECIFIEDhttps://orcid.org/0000-0002-7656-7842UNSPECIFIED
Glassmeier, K. H.TU Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Date:2 January 2020
Journal or Publication Title:Journal of Geophysical Research: Planets
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:125
DOI:10.1029/2019JE006035
Publisher:Wiley
ISSN:2169-9097
Status:Published
Keywords:asteroid, Ryugu, magnetic properties, Hayabusa2 mission
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):Project MASCOT Science and operation (old)
Location: Berlin-Adlershof , Bremen
Institutes and Institutions:Institute of Space Systems > Systems Engineering and Project Office
Institute of Optical Sensor Systems
Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Planetary Sensor Systems
Institute of Space Systems > Mechanic and Thermal Systems
Deposited By: Kührt, Dr.rer.nat. Ekkehard
Deposited On:28 Jul 2020 09:28
Last Modified:04 Dec 2023 14:38

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