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Mission record

Hiten

Also known as Muses-A

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

Explore trajectory

Completed · Success

A Japanese engineering mission that tested lunar swingbys and aerobraking, released the small Hagoromo spacecraft, and later entered lunar orbit. Hagoromo’s intended lunar orbit could not be confirmed after its transmitter failed.

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

Chronology

Mission timeline

  1. Launch

    Hiten launched from Kagoshima Space Center into a highly elliptical Earth orbit

  2. Loss of contact

    Hagoromo’s transmitter failed while it was still carried by Hiten

  3. Deployment

    The small Hagoromo spacecraft was released as Hiten approached its first lunar flyby

    Moon
  4. Milestone

    Hagoromo’s motor ignition was observed optically from Earth; orbital capture remained unconfirmed

    Moon
  5. Flyby

    Hiten reached its closest lunar flyby distance of 16,472.4 km

    Moon
  6. Milestone

    Hiten flew into the Earth's upper atmosphere at 125.5 km, the first use of aerobraking near escape velocity

    Earth
  7. Milestone

    Hiten completed its second Earth aerobraking pass at about120km altitude

    Earth
  8. Orbit insertion

    Most of Hiten's remaining fuel was used to put it into lunar orbit

    Moon
  9. Impact

    Hiten was crashed into the lunar surface

    The page gives two different impact times and locations, citing Uesugi 1996: 18:03:25.7 UT at 34.0 S, 55.3 E, and 18:08:45 UT at 34.3 S, 55.6 E. The event is recorded at day precision rather than choosing between them.

    Moon

Mission architecture

Vehicles

  • Hiten · Spacecraft

    Destinations: Moon

    • Hagoromo · Orbiter

      Destinations: Moon

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.

  • Hiten: Physically reconstructed based on publicly available data · bounded 90-minute Hiten state coast from an ISAS OD solution · January 24, 1990 to January 24, 1990

Provenance

Sources

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

Data verified through September 13, 2026