Magnetic Field Signatures Near Galileo's Closest Approach to Gaspra

@article{Kivelson1993MagneticFS,
  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},
  journal={Science},
  year={1993},
  volume={261},
  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… 

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