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🛰️ SATELLITE · HISTORICAL RECORD

Kobal't No. 529

Re-entered 28 Jan 1991

Kobal't No. 529 (NORAD 21000, COSPAR 1990-109A) was a SU satellite that re-entered Earth's atmosphere on 28 Jan 1991, launched on 4 Dec 1990 on the Kobal't mission. It was operated by UNKS as part of the Kobal't programme. The spacecraft was built by TSSKB on the Yantar'-4K2 bus, with a mass of 2,886 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
1991
re-entered
1
year on orbit
2,886
kg mass

Lifecycle

Launched4 Dec 1990 · on the Kobal't mission
Operational28 Jan 1991 · entered service
Retired28 Jan 1991 · end of operational service
Re-entered28 Jan 1991 · atmospheric re-entry — object destroyed

Specifications

NORAD ID21000
COSPAR1990-109A
TypeSatellite
OperatorUNKS
Country / StateSU
ManufacturerTSSKB
BusYantar'-4K2
Mass2,886 kg
ProgrammeKobal't
CategoryIMG
OrbitLEO (LLEO/I)
Altitude181 × 321 km
Inclination62.8°

Frequently asked questions

What happened to Kobal't No. 529?

Kobal't No. 529 re-entered Earth's atmosphere on 28 Jan 1991, 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 Kobal't No. 529 re-enter the atmosphere?

Kobal't No. 529 re-entered on 28 Jan 1991, according to Orbital Radar's historical catalogue records.

Who operated and built Kobal't No. 529?

Kobal't No. 529 was operated by UNKS and built by TSSKB (SU).

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