|Operator||Institute of Space and Astronautical Science, University of Tokyo|
|Payload mass||294.0 kg (648.2 lb)|
|Start of mission|
|Launch date||21 February, 1989 23:30:00 UTC|
|Launch site||Uchinoura Space Center, Japan|
|End of mission|
|Deactivated||23 April, 2015|
|Perigee||8,000 km (5,000 mi)|
|Apogee||300 km (190 mi)|
|Epoch||21 February, 1989|
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.
- 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.
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