DOS-6

Re-entered 7 Feb 1991

DOS-6 (NORAD 13138, COSPAR 1982-033A) was a SU satellite that re-entered Earth's atmosphere on 7 Feb 1991, launched on 19 Apr 1982 on the DOS 6 (17K No. 125-02) mission. It was operated by NPOE as part of the DOS programme. The spacecraft was built by ZIKH on the Almaz bus, with a mass of 19,824 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.

1982

launched

1991

re-entered

years on orbit

19,824

kg mass

Lifecycle

Launched19 Apr 1982 · on the DOS 6 (17K No. 125-02) mission

Operational7 Feb 1991 · entered service

Retired7 Feb 1991 · end of operational service

Re-entered7 Feb 1991 · atmospheric re-entry — object destroyed

Specifications

NORAD ID13138

COSPAR1982-033A

TypeSatellite

OperatorNPOE

Country / StateSU

ManufacturerZIKH

BusAlmaz

Mass19,824 kg

ProgrammeDOS

CategorySS

OrbitLEO (LLEO/I)

Altitude341 × 344 km

Inclination51.6°

Frequently asked questions

What happened to DOS-6?

DOS-6 re-entered Earth's atmosphere on 7 Feb 1991, ending a mission that began with its launch in 1982. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did DOS-6 re-enter the atmosphere?

DOS-6 re-entered on 7 Feb 1991, according to Orbital Radar's historical catalogue records.

Who operated and built DOS-6?

DOS-6 was operated by NPOE and built by ZIKH (SU).

Launched together

RK-02 (I-6)Re-entered 1982

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: DOS 6 (17K No. 125-02) → What is space debris? →