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🛰️ SATELLITE · HISTORICAL RECORD

IS-M No. 5xx-10-031

Re-entered 14 Mar 1981

IS-M No. 5xx-10-031 (NORAD 12337, COSPAR 1981-024A) was a SU satellite that re-entered Earth's atmosphere on 14 Mar 1981, launched on 14 Mar 1981 on the IS mission. It was operated by PKO as part of the IS 5V91TM programme. The spacecraft was built by KOMET on the IS bus, with a mass of 1,400 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
1,400
kg mass

Lifecycle

Launched14 Mar 1981 · on the IS mission
Operational14 Mar 1981 · entered service
Retired14 Mar 1981 · end of operational service
Re-entered14 Mar 1981 · atmospheric re-entry — object destroyed

Specifications

NORAD ID12337
COSPAR1981-024A
TypeSatellite
OperatorPKO
Country / StateSU
ManufacturerKOMET
BusIS
Mass1,400 kg
ProgrammeIS 5V91TM
CategoryWEAPON
OrbitLEO (LEO/I)
Altitude289 × 1,023 km
Inclination65.8°

Frequently asked questions

What happened to IS-M No. 5xx-10-031?

IS-M No. 5xx-10-031 re-entered Earth's atmosphere on 14 Mar 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 IS-M No. 5xx-10-031 re-enter the atmosphere?

IS-M No. 5xx-10-031 re-entered on 14 Mar 1981, according to Orbital Radar's historical catalogue records.

Who operated and built IS-M No. 5xx-10-031?

IS-M No. 5xx-10-031 was operated by PKO and built by KOMET (SU).

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