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🛰️ SATELLITE · HISTORICAL RECORD

N-4 No. 4

Re-entered 16 Sep 1966

N-4 No. 4 (NORAD 2290, COSPAR 1966-060A) was a SU satellite that re-entered Earth's atmosphere on 16 Sep 1966, launched on 6 Jul 1966 on the N-4 No. 4 mission. It was operated by TSKBEM as part of the N-4 programme. The spacecraft was built by TSKBEM on the Proton N-4 bus, with a mass of 12,200 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.

1966
launched
1966
re-entered
0
years on orbit
12,200
kg mass

Lifecycle

Launched6 Jul 1966 · on the N-4 No. 4 mission
Operational16 Sep 1966 · entered service
Retired16 Sep 1966 · end of operational service
Re-entered16 Sep 1966 · atmospheric re-entry — object destroyed

Specifications

NORAD ID2290
COSPAR1966-060A
TypeSatellite
OperatorTSKBEM
Country / StateSU
ManufacturerTSKBEM
BusProton N-4
Mass12,200 kg
ProgrammeN-4
CategorySCI
OrbitLEO (LLEO/I)
Altitude174 × 490 km
Inclination63.5°

Frequently asked questions

What happened to N-4 No. 4?

N-4 No. 4 re-entered Earth's atmosphere on 16 Sep 1966, ending a mission that began with its launch in 1966. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did N-4 No. 4 re-enter the atmosphere?

N-4 No. 4 re-entered on 16 Sep 1966, according to Orbital Radar's historical catalogue records.

Who operated and built N-4 No. 4?

N-4 No. 4 was operated by TSKBEM and built by TSKBEM (SU).

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