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Mission record

Suisei

Also known as Planet-A

Institute of Space and Aeronautical Science, U of Tokyo · Launched

Explore trajectory

Completed · Success

Suisei was launched into heliocentric orbit to fly by Comet P/Halley and encountered it in 1986.

Destinations
Launch vehicle
M-3SII
Launch site
Uchinoura Space Center, Japan
Countries
Japan
Mission types
Flyby

Chronology

Mission timeline

  1. Launch

    Launched from Uchinoura Space Center on an M-3SII

    Earth
  2. Flyby

    Encountered Comet Halley at 151,000 km

    1P/Halley

Mission architecture

Vehicles

  • Suisei · Spacecraft · completed

    Destinations: 1P/Halley

Trajectory record

Time-dependent navigation trajectory

Source states place the model at the selected time. Reconstructed flight, estimates, predictions and historical mission plans are identified by interval; gaps remain visible.

Source records and sampling assumptions are retained with the repository data. Model attitude and surface appearance are illustrative.

  • Suisei: NASA HelioWeb low-precision daily source positions, 1989–1990; frame inferred and velocities derived. · January 1, 1989 to March 30, 1990

Provenance

Sources

Each source is listed once and labeled with the mission, event, trajectory, or destination/body context it supports.

Data verified through October 12, 2026