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🛰️ SATELLITE · HISTORICAL RECORD

Argon No. 56L

Re-entered 18 Dec 1981

Argon No. 56L (NORAD 12989, COSPAR 1981-118A) was a SU satellite that re-entered Earth's atmosphere on 18 Dec 1981, launched on 4 Dec 1981 on the Zenit-6 mission. It was operated by GUKOS as part of the Zenit-6 programme. The spacecraft was built by TSSKB on the Zenit-6 bus, with a mass of 2,655 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.

1981
launched
1981
re-entered
0
years on orbit
2,655
kg mass

Lifecycle

Launched4 Dec 1981 · on the Zenit-6 mission
Operational18 Dec 1981 · entered service
Retired18 Dec 1981 · end of operational service
Re-entered18 Dec 1981 · atmospheric re-entry — object destroyed

Specifications

NORAD ID12989
COSPAR1981-118A
TypeSatellite
OperatorGUKOS
Country / StateSU
ManufacturerTSSKB
BusZenit-6
Mass2,655 kg
ProgrammeZenit-6
CategoryIMG
OrbitLEO (LLEO/I)
Altitude232 × 258 km
Inclination65.0°

Frequently asked questions

What happened to Argon No. 56L?

Argon No. 56L re-entered Earth's atmosphere on 18 Dec 1981, ending a mission that began with its launch in 1981. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Argon No. 56L re-enter the atmosphere?

Argon No. 56L re-entered on 18 Dec 1981, according to Orbital Radar's historical catalogue records.

Who operated and built Argon No. 56L?

Argon No. 56L was operated by GUKOS and built by TSSKB (SU).

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