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COsmic Background Explorer


Designation 20322 / 89089A
Launch date 18 Nov 1989
Country of origin United States
Mission Scientific: astronomy
Perigee/Apogee 872/886 km
Inclination 99°
Period 102.5 min
Launch vehicle Thor Delta #189

Studies the thermical radiation of the sky (gave its precise temperature: 2.735 K).

End of life

Out of service 1 May 1997

External resources

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Technical data


Prime contractor  
Mass at launch  
Dry mass 2265 kg
Dimension 4.0 m diameter x 5.8 m length
Solar array  
Stabilization spin stabilized
DC power  
Design lifetime  

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