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4V-1 No. 671

Re-entered 5 May 1981

4V-1 No. 671 (NORAD 5919, COSPAR 1972-023A) was a SU satellite that re-entered Earth's atmosphere on 5 May 1981, launched on 31 Mar 1972 on the 4V-1 No. 671 mission. It was operated by IKI / BABTS as part of the 4V-1A programme. The spacecraft was built by NPOL on the MV bus, with a mass of 689 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.

1972
launched
1981
re-entered
9
years on orbit
689
kg mass

Lifecycle

Launched31 Mar 1972 · on the 4V-1 No. 671 mission
Operational31 Mar 1972 · entered service
Retired31 Mar 1972 · end of operational service
Re-entered5 May 1981 · atmospheric re-entry — object destroyed

Specifications

NORAD ID5919
COSPAR1972-023A
TypeSatellite
OperatorIKI / BABTS
Country / StateSU
ManufacturerNPOL
BusMV
Mass689 kg (660 kg dry)
Programme4V-1A
CategoryPLAN/RV
OrbitMEO (MEO)
Altitude205 × 9,732 km
Inclination52.1°

Frequently asked questions

What happened to 4V-1 No. 671?

4V-1 No. 671 re-entered Earth's atmosphere on 5 May 1981, ending a mission that began with its launch in 1972. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did 4V-1 No. 671 re-enter the atmosphere?

4V-1 No. 671 re-entered on 5 May 1981, according to Orbital Radar's historical catalogue records.

Who operated and built 4V-1 No. 671?

4V-1 No. 671 was operated by IKI / BABTS and built by NPOL (SU).

Launched together

SA 4V-1Re-entered 2025
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.