The Magnetization of 433 Eros as Measured from its Surface

Details The Magnetization of 433 Eros as Measured from its Surface The Magnetization of 433 Eros as Measured from its Surface

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..gp22a10a&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #GP22A-10

Physics

6030 Magnetic Fields And Magnetism, 6205 Asteroids And Meteoroids

Scientific paper

The Near Earth Asteroid Rendezvous (NEAR) spacecraft performed several close range (<5 km) magnetic field measurements of 433 Eros from December 2000 until its landing on the asteroid on February 12th, 2001. After the surprising spacecraft survival of the landing, operation of the Magnetic Field Experiment on the surface of Eros was resumed on Feb 14th and data were acquired during two DSN contacts providing a total of ~5 hours of data. Consistent with the collection of Eros orbital data which yields data over the entire asteroid at Eros-centric distances of 35 km, the new measurements yielded no detectable signature of an intrinsic magnetic field to a confidence of ~1 nT. Current best estimates places an upper limit on the volume magnetization of Eros at ~0.001 A-m2. The magnetic field measurements acquired during the late phase of the mission will be presented and discussed, including inferences derived from previous and synergistic measurements as well as finite element modeling results. The null result implies that the magnetization state of Eros is substantially lower than that of meteorites, including LL-chondrites which are the closest compositional analog to Eros.

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