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🛰️ SATELLITE · HISTORICAL RECORD

AE-C

Re-entered 12 Dec 1978

AE-C (NORAD 6977, COSPAR 1973-101A) was a US satellite that re-entered Earth's atmosphere on 12 Dec 1978, launched on 16 Dec 1973 on the AE-C mission. It was operated by GSFC as part of the Explorer AE programme. The spacecraft was built by RCA on the AE-C bus, with a mass of 668 kg. Like most satellites in low orbits, it was gradually slowed by atmospheric drag until re-entry. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.

1973
launched
1978
re-entered
5
years on orbit
668
kg mass

Lifecycle

Launched16 Dec 1973 · on the AE-C mission
Operational11 Dec 1978 · entered service
Retired11 Dec 1978 · end of operational service
Re-entered12 Dec 1978 · atmospheric re-entry — object destroyed

Specifications

NORAD ID6977
COSPAR1973-101A
TypeSatellite
OperatorGSFC
Country / StateUS
ManufacturerRCA
BusAE-C
Mass668 kg (500 kg dry)
ProgrammeExplorer AE
CategoryEOSCI
OrbitMEO (MEO)
Altitude152 × 4,074 km
Inclination68.1°

Frequently asked questions

What happened to AE-C?

AE-C re-entered Earth's atmosphere on 12 Dec 1978, ending a mission that began with its launch in 1973. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did AE-C re-enter the atmosphere?

AE-C re-entered on 12 Dec 1978, according to Orbital Radar's historical catalogue records.

Who operated and built AE-C?

AE-C was operated by GSFC and built by RCA (US).

Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.