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🛰️ SATELLITE · HISTORICAL RECORD

SAS A

Re-entered 5 Apr 1979

SAS A (NORAD 4797, COSPAR 1970-107A) was a US satellite that re-entered Earth's atmosphere on 5 Apr 1979, launched on 12 Dec 1970 on the SAS A mission. It was operated by GSFC as part of the SAS programme. The spacecraft was built by APL on the SAS bus, with a mass of 143 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.

1970
launched
1979
re-entered
9
years on orbit
143
kg mass

Lifecycle

Launched12 Dec 1970 · on the SAS A mission
Operational18 Mar 1973 · entered service
Retired11 Apr 1973 · end of operational service
Re-entered5 Apr 1979 · atmospheric re-entry — object destroyed

Specifications

NORAD ID4797
COSPAR1970-107A
TypeSatellite
OperatorGSFC
Country / StateUS
ManufacturerAPL
BusSAS
Mass143 kg
ProgrammeSAS
CategoryAST
OrbitLEO (LLEO/E)
Altitude534 × 573 km
Inclination3.0°

Frequently asked questions

What happened to SAS A?

SAS A re-entered Earth's atmosphere on 5 Apr 1979, ending a mission that began with its launch in 1970. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did SAS A re-enter the atmosphere?

SAS A re-entered on 5 Apr 1979, according to Orbital Radar's historical catalogue records.

Who operated and built SAS A?

SAS A was operated by GSFC and built by APL (US).

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