Uhuru
Orbiter
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Uhuru was the first satellite launched specifically for the purpose of X-ray astronomy. It was also known as the X-ray Explorer Satellite, SAS-A, SAS 1, or Explorer 42. Wikipedia
Launch date: December 12, 1970
Manufacturer: NASA
Decay date: 5 April 1979
Mission duration: 3 years
Reference system: Geocentric
Rocket: Scout B S175C