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HEAO-1

HEAO-1 was a NASA X-ray survey mission launched into a nearly circular low Earth orbit on August 12, 1977. Its scanning observatory mapped the high-energy sky repeatedly and monitored sources near the ecliptic poles until January 1979.

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Identity

Aliases
HEAO-1HEAO-AHigh Energy Astronomy Observatory 1
Name
HEAO-1
Status
completed

Details

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Description
HEAO-1 was a NASA X-ray survey mission launched into a nearly circular low Earth orbit on August 12, 1977. Its scanning observatory mapped the high-energy sky repeatedly and monitored sources near the ecliptic poles until January 1979.
Destination
Low Earth orbit
End Date
1979-01-09
Outcome
HEAO-1 completed its principal all-sky survey and ended operations after its attitude-control gas was exhausted.
Start Date
1977-08-12
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Creation Time
August 1, 2026 at 16:05:11 UTC
Updated Time
August 1, 2026 at 16:05:11 UTC

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