Suisei was an ISAS (Japan) mission which flew by Comet Halley on 8 March 1986 and studied Halley's UV hydrogen corona and the solar wind. Suisei flew by the Earth on 20 August 1992, shortly after running out of fuel for maneuvering. Further planned encounters for Suisei (with comets Giacobini-Zinner and Tempel-Tuttle) have been cancelled. The Suisei spacecraft was almost identical to its companion Halley's comet mission, Sakigake.
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