Advanced Composition Explorer
Spacecraft
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Advanced Composition Explorer is a NASA Explorer program satellite and space exploration mission to study matter comprising energetic particles from the solar wind, the interplanetary medium, and other sources. Wikipedia
Spacecraft: Explorer LXXI
Manufacturer: Applied Physics Laboratory
Launch date: August 25, 1997
Perigee altitude: 145,700,000 km (90,500,000 mi)
Bus: ACE
Dimensions: 2 m (6 ft 7 in) in diameter; 1.9 m (6 ft 3 in) in length; wingspan of 8.3 m (27 ft)
Dry mass: 562 kg (1,239 lb)