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🛰️ SATELLITE · HISTORICAL RECORD

Kobal't No. 506

Re-entered 22 Apr 1987

Kobal't No. 506 (NORAD 17559, COSPAR 1987-021A) was a SU satellite that re-entered Earth's atmosphere on 22 Apr 1987, launched on 26 Feb 1987 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.

1987
launched
1987
re-entered
0
years on orbit
2,886
kg mass

Lifecycle

Launched26 Feb 1987 · on the Kobal't mission
Operational22 Apr 1987 · entered service
Retired22 Apr 1987 · end of operational service
Re-entered22 Apr 1987 · atmospheric re-entry — object destroyed

Specifications

NORAD ID17559
COSPAR1987-021A
TypeSatellite
OperatorUNKS
Country / StateSU
ManufacturerTSSKB
BusYantar'-4K2
Mass2,886 kg
ProgrammeKobal't
CategoryIMG
OrbitLEO (LLEO/I)
Altitude160 × 307 km
Inclination67.1°

Frequently asked questions

What happened to Kobal't No. 506?

Kobal't No. 506 re-entered Earth's atmosphere on 22 Apr 1987, ending a mission that began with its launch in 1987. 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. 506 re-enter the atmosphere?

Kobal't No. 506 re-entered on 22 Apr 1987, according to Orbital Radar's historical catalogue records.

Who operated and built Kobal't No. 506?

Kobal't No. 506 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.