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High Energy Transient Experiment

The original High Energy Transient Experiment was a NASA and MIT Explorer payload designed to detect gamma-ray bursts and coordinate simultaneous gamma-ray, X-ray, and ultraviolet observations. Its onboard instruments were intended to localize bursts rapidly enough for immediate follow-up, an objective later recovered by the separately built HETE-2 mission.

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Identity

Aliases
HETEHETE-1HETE 1
Name
High Energy Transient Experiment
Slug
high-energy-transient-experiment
Status
failed

Details

Astronauts
-
Description
The original High Energy Transient Experiment was a NASA and MIT Explorer payload designed to detect gamma-ray bursts and coordinate simultaneous gamma-ray, X-ray, and ultraviolet observations. Its onboard instruments were intended to localize bursts rapidly enough for immediate follow-up, an objective later recovered by the separately built HETE-2 mission.
End Date
1996-11-04
Launch Site
Outcome
HETE reached the planned orbit but remained enclosed in the dual-payload structure when the Pegasus third stage failed to execute spacecraft separation. Its solar arrays could not deploy, battery power was exhausted, and no scientific observations were returned.
Program
Explorer Program
Start Date
1996-11-04
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Creation Time
July 18, 2026 at 15:51:18 UTC
Updated Time
July 18, 2026 at 15:51:18 UTC

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