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🛰️ SATELLITE · HISTORICAL RECORD

Kosmos-987

Re-entered 14 Feb 1978

Kosmos-987 (NORAD 10639, COSPAR 1978-013A) was a SU satellite that re-entered Earth's atmosphere on 14 Feb 1978, launched on 31 Jan 1978 on the Zenit-4MKM mission. It is catalogued as Gerakl' No. 93L. It was operated by GUKOS RVSN as part of the Zenit-4MKM programme. The spacecraft was built by TSSKB on the Zenit-4MK bus, with a mass of 2,400 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.

1978
launched
1978
re-entered
0
years on orbit
2,400
kg mass

Lifecycle

Launched31 Jan 1978 · on the Zenit-4MKM mission
Operational14 Feb 1978 · entered service
Retired14 Feb 1978 · end of operational service
Re-entered14 Feb 1978 · atmospheric re-entry — object destroyed

Specifications

NORAD ID10639
COSPAR1978-013A
TypeSatellite
OperatorGUKOS RVSN
Country / StateSU
ManufacturerTSSKB
BusZenit-4MK
Mass2,400 kg
ProgrammeZenit-4MKM
CategoryIMG
OrbitLEO (LLEO/I)
Altitude172 × 313 km
Inclination62.8°

Frequently asked questions

What happened to Kosmos-987?

Kosmos-987 re-entered Earth's atmosphere on 14 Feb 1978, ending a mission that began with its launch in 1978. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Kosmos-987 re-enter the atmosphere?

Kosmos-987 re-entered on 14 Feb 1978, according to Orbital Radar's historical catalogue records.

Who operated and built Kosmos-987?

Kosmos-987 was operated by GUKOS RVSN and built by TSSKB (SU).

Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-10-05.