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🛰️ SATELLITE · HISTORICAL RECORD

N-4 No. 2

Re-entered 6 Feb 1966

N-4 No. 2 (NORAD 1701, COSPAR 1965-087A) was a SU satellite that re-entered Earth's atmosphere on 6 Feb 1966, launched on 2 Nov 1965 on the N-4 No. 2 mission. It was operated by OKB1 as part of the N-4 programme. The spacecraft was built by OKB1 on the Proton N-4 bus, with a mass of 8,300 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.

1965
launched
1966
re-entered
1
year on orbit
8,300
kg mass

Lifecycle

Launched2 Nov 1965 · on the N-4 No. 2 mission
Operational6 Feb 1966 · entered service
Retired6 Feb 1966 · end of operational service
Re-entered6 Feb 1966 · atmospheric re-entry — object destroyed

Specifications

NORAD ID1701
COSPAR1965-087A
TypeSatellite
OperatorOKB1
Country / StateSU
ManufacturerOKB1
BusProton N-4
Mass8,300 kg
ProgrammeN-4
CategorySCI
OrbitLEO (LLEO/I)
Altitude151 × 277 km
Inclination63.4°

Frequently asked questions

What happened to N-4 No. 2?

N-4 No. 2 re-entered Earth's atmosphere on 6 Feb 1966, ending a mission that began with its launch in 1965. 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. 2 re-enter the atmosphere?

N-4 No. 2 re-entered on 6 Feb 1966, according to Orbital Radar's historical catalogue records.

Who operated and built N-4 No. 2?

N-4 No. 2 was operated by OKB1 and built by OKB1 (SU).

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