Magnetic Field Signatures Near Galileo's Closest Approach to Gaspra

  title={Magnetic Field Signatures Near Galileo's Closest Approach to Gaspra},
  author={Margaret G. Kivelson and Lee Bargatze and Krishan K. Khurana and David J. Southwood and Raymond J. Walker and PAUL J. Coleman},
  pages={331 - 334}
Two large magnetic field rotations were recorded by the spacecraft Galileo 1 minute before and 2 minutes after its closest approach to the asteroid Gaspra. The timing and the geometry of the field changes suggest a connection with Gaspra, and the events can be interpreted as the result of the draping of the solar wind field around a magnetospheric obstacle. Gaspra's surface field is inferred to be within an order of magnitude of Earth's surface field, and its magnetic moment per unit mass is in… 

A Magnetohydrodynamic Model of Solar Wind Interaction with Asteroid Gaspra

The solar wind response to a small-sized magnetized body is modeled on the basis of a two-dimensional magnetohydrodynamic (MHD) plasma description including Hall current corrections (Hall-MHD model).


T he primary objective of the Magnetic Field Instrument on the Near Earth Asteroid Rendezvous (NEAR) spacecraft is to search for and characterize the magnetic field of the asteroid Eros to better

Recent magnetic field results from the Galileo and Ulysses spacecraft

  • D. Southwood
  • Physics, Geology
    Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences
  • 1994
The contrast between the field and plasma environment detected on the inbound (morning sector) and outbound (dusk) pass of Ulysses raises challenging questions about how much acceleration occurs as material rotates around the dayside of Jupiter.

First direct magnetic field measurements of an asteroidal magnetic field: DS1 at Braille

Deep Space 1 (DS1) is the first interplanetary spacecraft (s/c) using ion propulsion and aims at investigating the compatibility of innovative technology with scientific measurements. DS1 performed a

Interaction of the solar wind with magnetized asteroids

RESUME We use a 2-D hybrid code (fluid electrons, particle ions) to simulate the interaction of the solar wind with a magnetized asteroid. The asteroid field is taken as a dipole with different

Hybrid simulations of solar wind interaction with magnetized asteroids: Comparison with Galileo observations near Gaspra and Ida

[1] We use a two-dimensional hybrid code (fluid electrons and particle ions) to simulate the interaction of the solar wind with a magnetized asteroid. Understanding the nature of this interaction and

NEAR Magnetic Field Observations at 433 Eros: First Measurements from the Surface of an Asteroid

Abstract The magnetometer investigation aboard the NEAR-Shoemaker spacecraft has obtained extensive magnetic field observations throughout the 433 Eros environment, from distances in excess of



A gas dynamic magnetosheath field model for unsteady interplanetary fields - Application to the solar wind interaction with Venus

The steady state gas dynamic model of magnetosheath magnetic fields previously developed by Spreiter and Stahara (1980) is generalized for the common situation of a temporally varying interplanetary

The Galileo magnetic field investigation

The Galileo Orbiter carries a complement of fields and particles instruments designed to provide data needed to shed light on the structure and dynamical variations of the Jovian magnetosphere. Many

Magnetic flux transfer associated with expansions and contractions of the dayside magnetosphere

An empirical magnetopause model is developed by using Ogo 5 magnetometer data, solar wind data from three satellites, and auroral zone magnetic indices. By employing this model it is found that the

Drag and propulsion of large satellites in the ionosphere: An Alfvén propulsion engine in space

There is a motionally induced charge separation in a conductor moving across magnetic field lines. This charge may be conducted away, resulting in a dc current flow through the conductor if it moves

Evidence for a primordial magnetic field during the meteorite parent body era

A total of 247 measurements of natural magnetic remanence (NRM) and effective susceptibility of meteorites tabulated by Herndon et al. (1972) from Russian data is investigated. A log-log plot of p¯,

The Galileo Plasma wave investigation

The purpose of the Galileo plasma wave investigation is to study plasma waves and radio emissions in the magnetosphere of Jupiter. The plasma wave instrument uses an electric dipole antenna to detect

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Galileo images of Gaspra reveal it to be an irregularly shaped object that appears to have been created by a catastrophic collisional disruption of a precursor parent body.

The Plasma Instrumentation for the Galileo Mission

The plasma instrumentation (PLS) for the Galileo Mission comprises a nested set of four spherical-plate electrostatic analyzers and three miniature, magnetic mass spectrometers. The three-dimensional

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