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🛰️ SATELLITE · HISTORICAL RECORD

I2M No. 314

Re-entered 26 Feb 1980

I2M No. 314 (NORAD 3503, COSPAR 1968-090A) was a SU satellite that re-entered Earth's atmosphere on 26 Feb 1980, launched on 19 Oct 1968 on the I2M mission. It was operated by PKO as part of the IS 5V91 programme. The spacecraft was built by TSKBM/KB1 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.

1968
launched
1980
re-entered
12
years on orbit
1,400
kg mass

Lifecycle

Launched19 Oct 1968 · on the I2M mission
Operational1 Nov 1968 · entered service
Retired1 Nov 1968 · end of operational service
Re-entered26 Feb 1980 · atmospheric re-entry — object destroyed

Specifications

NORAD ID3503
COSPAR1968-090A
TypeSatellite
OperatorPKO
Country / StateSU
ManufacturerTSKBM/KB1
BusIS
Mass1,400 kg
ProgrammeIS 5V91
CategoryTARG
OrbitLEO (LLEO/I)
Altitude469 × 543 km
Inclination62.3°

Frequently asked questions

What happened to I2M No. 314?

I2M No. 314 re-entered Earth's atmosphere on 26 Feb 1980, ending a mission that began with its launch in 1968. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did I2M No. 314 re-enter the atmosphere?

I2M No. 314 re-entered on 26 Feb 1980, according to Orbital Radar's historical catalogue records.

Who operated and built I2M No. 314?

I2M No. 314 was operated by PKO and built by TSKBM/KB1 (SU).

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