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Spacecraft nr: 31

USA satellite nr: 24
Signal Communication by Orbiting Relay Experiment

Launch data:

Designation00010 / 1958 Zeta 1 / 58006A
Launch date18 Dec 1958 - 23:02 UT
Launch siteCC, LC11
Launch vehicle Atlas B (#10B)
MissionTelecommunications
Earth orbit on Dec 19, 1958:
Perigee / Apogee 185 x 1484 km
Eccentricity 0.090
Inclination 32.3 deg
Period 101.47 min

Broadcast President Eisenhower Christmas wishes that had been recorded during 13 days.
First experimental communication satellite

Spacecraft data:

Prime contractor  
Customer  
Mass at launch  3900 kg
Payload 70 kg
Basic shape  Cylinder
Dimension (m) 25 long 3,0 dia

End of life

Decay21 Jan 1959
Lifetime33.6 days
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