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Japanese satellite From Wikipedia, the free encyclopedia
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 21, 1989.
Names | EXOS-D | ||||||||||||||||||
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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 UTC | ||||||||||||||||||
Rocket | M-3SII, mission M-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 altitude | 300 km (190 mi) | ||||||||||||||||||
Apogee altitude | 8,000 km (5,000 mi) | ||||||||||||||||||
Inclination | 75° | ||||||||||||||||||
Epoch | 20 February 1989, 19:00 UTC | ||||||||||||||||||
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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]
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