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Preparing the latest launch data.

T-Minus Zero

Primary launch schedule data: The Space Devs - Launch Library 2

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EXPLORER 55 (AE-5) (NORAD 8440) | T-Minus Zero

Satellite

EXPLORER 55 (AE-5)

1975-107ANORAD 8440United States (US)Ops: D

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Catalog

OwnerUnited States (US)

Object typePAY

Launch siteAFETR

Launch designator1975-107

Period87.19 min

Inclination19.63°

Altitude135 km → 135 km

RCS1.524 m²

SATCAT updated2026-01-31T16:30:01.889+00:00

Orbit (latest)

No orbit elements found yet.