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Yohkoh (Solar-A) solar observatory spacecraft

Yohkoh, formerly Solar-A, was an ISAS/JAXA solar observatory spacecraft that studied solar flares and the high-energy corona through a full solar-activity cycle. Its low-Earth orbit enabled long-running X-ray and gamma-ray observations during the 1990s.

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Identity

Aliases
YohkohSolar-ASOLAR-AYohkoh spacecraft
Family Name
Yohkoh
Full Name
Yohkoh (Solar-A) solar observatory spacecraft
Roles
orbiterobservatory
Status
retired
Type
spacecraft

Details

Description
Yohkoh, formerly Solar-A, was an ISAS/JAXA solar observatory spacecraft that studied solar flares and the high-energy corona through a full solar-activity cycle. Its low-Earth orbit enabled long-running X-ray and gamma-ray observations during the 1990s.
First Flight Year
1,991
Last Flight Year
1,991
Manufacturer
Operator
Spacecraft Specs
Launch Mass Kg
390
Reusability
expendable

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Assets & Meta

Creation Time
August 1, 2026 at 00:02:29 UTC
Updated Time
August 1, 2026 at 00:02:29 UTC

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Programs
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