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Oko 73D6 No. 6037

Re-entered 30 Oct 2024

Oko 73D6 No. 6037 (NORAD 16993, COSPAR 1986-075A) was a SU satellite that re-entered Earth's atmosphere on 30 Oct 2024, launched on 3 Oct 1986 on the Oko mission. It was operated by PVO as part of the Oko E programme. The spacecraft was built by NPOL/KOMET on the Oko bus, with a mass of 1,250 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.

1986
launched
2024
re-entered
38
years on orbit
1,250
kg mass

Lifecycle

Launched3 Oct 1986 · on the Oko mission
Operational8 Oct 1986 · entered service
Retired8 Oct 1986 · end of operational service
Re-entered30 Oct 2024 · atmospheric re-entry — object destroyed

Specifications

NORAD ID16993
COSPAR1986-075A
TypeSatellite
OperatorPVO
Country / StateSU
ManufacturerNPOL/KOMET
BusOko
Mass1,250 kg (1,150 kg dry)
ProgrammeOko E
CategoryEW
OrbitHEO (HEO)
Altitude612 × 20,041 km
Inclination62.8°

Frequently asked questions

What happened to Oko 73D6 No. 6037?

Oko 73D6 No. 6037 re-entered Earth's atmosphere on 30 Oct 2024, ending a mission that began with its launch in 1986. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Oko 73D6 No. 6037 re-enter the atmosphere?

Oko 73D6 No. 6037 re-entered on 30 Oct 2024, according to Orbital Radar's historical catalogue records.

Who operated and built Oko 73D6 No. 6037?

Oko 73D6 No. 6037 was operated by PVO and built by NPOL/KOMET (SU).

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