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🛰️ SATELLITE · HISTORICAL RECORD

I2P No. 412?

Re-entered 20 Oct 1968

I2P No. 412? (NORAD 3504, COSPAR 1968-091A) was a SU satellite that re-entered Earth's atmosphere on 20 Oct 1968, launched on 20 Oct 1968 on the I2P 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
1968
re-entered
0
years on orbit
1,400
kg mass

Lifecycle

Launched20 Oct 1968 · on the I2P mission
Operational20 Oct 1968 · entered service
Retired20 Oct 1968 · end of operational service
Re-entered20 Oct 1968 · atmospheric re-entry — object destroyed

Specifications

NORAD ID3504
COSPAR1968-091A
TypeSatellite
OperatorPKO
Country / StateSU
ManufacturerTSKBM/KB1
BusIS
Mass1,400 kg
ProgrammeIS 5V91
CategoryWEAPON
OrbitLEO (LLEO/I)
Altitude104 × 137 km
Inclination62.3°

Frequently asked questions

What happened to I2P No. 412??

I2P No. 412? re-entered Earth's atmosphere on 20 Oct 1968, 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 I2P No. 412? re-enter the atmosphere?

I2P No. 412? re-entered on 20 Oct 1968, according to Orbital Radar's historical catalogue records.

Who operated and built I2P No. 412??

I2P No. 412? 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.