Akebono (satellite)

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Names EXOS-D
Mission type Earth observation
Operator ISAS · University of Tokyo
COSPAR ID 1989-016A
SATCAT no. 19822
Mission duration Final: 26 years, 2 months, 1 day
Spacecraft properties
Launch mass 294 kg (648 lb)
Start of mission
Launch date 21 February 1989, 23:30 (1989-02-21UTC23:30) UTC
Rocket Mu-3SII-1
Launch site Uchinoura Space Center, Japan
End of mission
Disposal Decommissioned
Deactivated 23 April 2015
Orbital parameters
Reference system Geocentric
Regime Low Earth
Eccentricity 0.36552
Perigee 300 km (190 mi)
Apogee 8,000 km (5,000 mi)
Inclination 75°
Epoch 20 February 1989, 19:00 UTC

Akebono (known as EXOS-D before launch) is a satellite to study aurora and Earth's magnetosphere environment. It was developed by Institute of Space and Astronautical Science and launched by M-3SII rocket on February 22, 1989.

After 26 years of successful observation, operation was terminated on April 23, 2015, due to the degradation of solar cells and the decay of orbit.[1]

See also[edit]


  1. ^ 磁気圏観測衛星「あけぼの」の運用終了について [On Termination of Operation of the Magnetosphere Observation Satellite Akebono]. JAXA. April 23, 2015. Retrieved April 23, 2015. 

External links[edit]