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Also called X4


Designation 07213 / 74013A
Launch date 9 Mar 1974
Country of origin United Kingdom
Mission Technology experimentation
Perigee/Apogee 677/865 km
Inclination 97.9°
Period 100.3 min
Launch vehicle Scout #86
Mass at launch 93 kg

Built and operated by the RAE. Tested a stabilization system, solar panels and cells

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