Oko 73D6 No. 6056

Re-entered 28 Dec 2014

Oko 73D6 No. 6056 (NORAD 20767, COSPAR 1990-076A) was a SU satellite that re-entered Earth's atmosphere on 28 Dec 2014, launched on 28 Aug 1990 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.

1990

launched

2014

re-entered

years on orbit

1,250

kg mass

Lifecycle

Launched28 Aug 1990 · on the Oko mission

Operational1 Jan 1994 · entered service

Retired1 Jan 1994 · end of operational service

Re-entered28 Dec 2014 · atmospheric re-entry — object destroyed

Specifications

NORAD ID20767

COSPAR1990-076A

TypeSatellite

OperatorPVO

Country / StateSU

ManufacturerNPOL/KOMET

BusOko

Mass1,250 kg (1,150 kg dry)

ProgrammeOko E

CategoryEW

OrbitHEO (HEO/M)

Altitude634 × 39,737 km

Inclination63.0°

Frequently asked questions

What happened to Oko 73D6 No. 6056?

Oko 73D6 No. 6056 re-entered Earth's atmosphere on 28 Dec 2014, ending a mission that began with its launch in 1990. 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. 6056 re-enter the atmosphere?

Oko 73D6 No. 6056 re-entered on 28 Dec 2014, according to Orbital Radar's historical catalogue records.

Who operated and built Oko 73D6 No. 6056?

Oko 73D6 No. 6056 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.

Browse the live satellite directory → Re-entered satellites archive → Launch record: Oko → What is space debris? →