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Oko 73D6 No. 6038

Re-entered 15 May 2011

Oko 73D6 No. 6038 (NORAD 17134, COSPAR 1986-091A) was a SU satellite that re-entered Earth's atmosphere on 15 May 2011, launched on 20 Nov 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
2011
re-entered
25
years on orbit
1,250
kg mass

Lifecycle

Launched20 Nov 1986 · on the Oko mission
Operational13 Jun 1991 · entered service
Retired13 Jun 1991 · end of operational service
Re-entered15 May 2011 · atmospheric re-entry — object destroyed

Specifications

NORAD ID17134
COSPAR1986-091A
TypeSatellite
OperatorPVO
Country / StateSU
ManufacturerNPOL/KOMET
BusOko
Mass1,250 kg (1,150 kg dry)
ProgrammeOko E
CategoryEW
OrbitHEO (HEO/M)
Altitude639 × 39,717 km
Inclination63.0°

Frequently asked questions

What happened to Oko 73D6 No. 6038?

Oko 73D6 No. 6038 re-entered Earth's atmosphere on 15 May 2011, 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. 6038 re-enter the atmosphere?

Oko 73D6 No. 6038 re-entered on 15 May 2011, according to Orbital Radar's historical catalogue records.

Who operated and built Oko 73D6 No. 6038?

Oko 73D6 No. 6038 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.