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ISEE-3 / International Cometary Explorer

ISEE-3 was a NASA heliophysics observatory placed in the first halo orbit around the Sun-Earth L1 point. After its original solar-wind and magnetotail work, it was renamed International Cometary Explorer and redirected to a comet encounter.

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Identity

Aliases
ISEE-3International Sun-Earth Explorer 3International Cometary ExplorerICEISEE-CExplorer 59
Name
ISEE-3 / International Cometary Explorer
Slug
isee-3-international-cometary-explorer
Status
completed

Details

Astronauts
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Description
ISEE-3 was a NASA heliophysics observatory placed in the first halo orbit around the Sun-Earth L1 point. After its original solar-wind and magnetotail work, it was renamed International Cometary Explorer and redirected to a comet encounter.
End Date
1997-05-05
Launch Site
Outcome
The spacecraft completed pioneering L1 and magnetotail observations, became the first probe to fly past a comet at Giacobini-Zinner on September 11, 1985, and supplied upstream solar-wind data for the Halley campaign. NASA ended operations on May 5, 1997.
Program
International Sun-Earth Explorer
Start Date
1978-08-12
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Creation Time
July 18, 2026 at 13:08:46 UTC
Updated Time
July 18, 2026 at 13:08:46 UTC

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