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SHINSEI (MS-F2)

Japan's first scientific satellite, SHINSEI (MS-F2), launched on 1971-09-28 aboard M-4S-3 from Uchinoura. It observed the ionosphere, cosmic rays, and shortwave-band solar radio noise, returning scientific results through its 1973 operations.

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Identity

Aliases
SHINSEIMS-F2Shinsei Scientific Satellite
Name
SHINSEI (MS-F2)
Status
completed

Details

Astronauts
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Description
Japan's first scientific satellite, SHINSEI (MS-F2), launched on 1971-09-28 aboard M-4S-3 from Uchinoura. It observed the ionosphere, cosmic rays, and shortwave-band solar radio noise, returning scientific results through its 1973 operations.
Destination
Elliptical Earth orbit at approximately 870 km perigee and 1,870 km apogee (32° inclination; 113-minute period)
End Date
1973-06
Launch Site
Outcome
Partially successful. The electron-temperature probe was damaged immediately after exposure to space and one cosmic-ray Geiger counter malfunctioned, but all other instruments operated normally. The mission detected abnormal ionization around South America, and its solar-radio observations revealed the generation mechanism of shortwave-band solar-radio waves. Operations continued until June 1973.
Programs
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Start Date
1971-09-28
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Creation Time
August 15, 2026 at 22:47:34 UTC
Updated Time
September 7, 2026 at 23:02:15 UTC

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