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Suisei
Suisei Mission to Comets

Goals: The main objective was to take UV images of Comet Halley's hydrogen coma for about 30 days before and after the comet's crossing of the ecliptic plane. The spacecraft was also to gather data on the solar wind.

Accomplishments: Suisei flew by Comet Halley at a distance of about 151,000 km, returning ultraviolet images from within the giant coma of hydrogen gas surrounding the nucleus. It detected cometary water, carbon monoxide and carbon dioxide ions, and observed at least two major and four minor outbursts. Suisei observed that the solar wind slowed from 350 km/s to 70 km/s at a distance of about 420,000 km from the comet.


Key Dates
18 Aug 1985:  Launch
8 Mar 1986:  Comet Halley Flyby
Status: Successful
Fast Facts
Suisei Facts Suisei means comet in Japanese. It was also the name of a Japanese World War II fighter (right).

Even though it kepts it distance from comet Halley, Suisei was still hit by dust particles.

Suisei was 1.4 kg (3 pounds) heavier than its sister spacecraft, Sakigake.
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Last Updated: 1 Dec 2010