Magnetic Properties of Asteroid (162173) Ryugu
Name
2019JE006035.pdf
Description
Published version
Size
10.46 MB
Format
Unknown
Checksum (MD5)
437c97dd6a22bd53e61a96bf611591ef
Author(s)
Hercik, David
Auster, Hans-Ulrich
Constantinescu, Dragos
Blum, Jürgen
Fornaçon, Karl-Heinz
Fujimoto, Masaki
Gebauer, Kathrin
Grundmann, Jan-Thimo
Güttler, Carsten
Hillenmaier, Olaf
Date Issued
2020
Journal
Journal of Geophysical Research: Planets
Publisher
American Geophysical Union (AGU)
Version
Final published version
Abstract
©2020. The Authors. Observations of the magnetization state of asteroids indicate diverse properties. Values between 1.9 × 10 -6Am2/kg (Eros) and 10-2 Am2/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. 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.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution NonCommercial License 4.0
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1029/2019JE006035
