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HEOS-2 Highly Eccentric Orbit Satellite spacecraft

HEOS-2 was an ESRO-built spacecraft launched by NASA on 31 January 1972 into a highly eccentric Earth orbit to investigate interplanetary space and the high-latitude magnetosphere and its boundary near the northern neutral point, continuing the HEOS study of the interplanetary medium.

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Identity

Aliases
HEOS-2HEOS 2HEOS-BHighly Eccentric Orbit Satellite 2
Family Name
HEOS-2
Full Name
HEOS-2 Highly Eccentric Orbit Satellite spacecraft
Roles
orbiterinterplanetary_probeobservatoryresearch
Status
retired
Type
spacecraft

Details

Description
HEOS-2 was an ESRO-built spacecraft launched by NASA on 31 January 1972 into a highly eccentric Earth orbit to investigate interplanetary space and the high-latitude magnetosphere and its boundary near the northern neutral point, continuing the HEOS study of the interplanetary medium.
First Flight Year
1,972
Last Flight Year
1,974
Operator

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Creation Time
August 13, 2026 at 13:33:55 UTC
Updated Time
August 14, 2026 at 19:27:04 UTC