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Zenit-6 No. 5L

Re-entered 24 Oct 1977

Zenit-6 No. 5L (NORAD 10403, COSPAR 1977-100A) was a SU satellite that re-entered Earth's atmosphere on 24 Oct 1977, launched on 11 Oct 1977 on the Zenit-6 mission. It was operated by GUKOSR as part of the Zenit-6 programme. The spacecraft was built by TSSKB on the Zenit-6 bus, with a mass of 2,655 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.

1977
launched
1977
re-entered
0
years on orbit
2,655
kg mass

Lifecycle

Launched11 Oct 1977 · on the Zenit-6 mission
Operational24 Oct 1977 · entered service
Retired24 Oct 1977 · end of operational service
Re-entered24 Oct 1977 · atmospheric re-entry — object destroyed

Specifications

NORAD ID10403
COSPAR1977-100A
TypeSatellite
OperatorGUKOSR
Country / StateSU
ManufacturerTSSKB
BusZenit-6
Mass2,655 kg
ProgrammeZenit-6
CategoryIMG
OrbitLEO (LLEO/I)
Altitude317 × 422 km
Inclination62.8°

Frequently asked questions

What happened to Zenit-6 No. 5L?

Zenit-6 No. 5L re-entered Earth's atmosphere on 24 Oct 1977, ending a mission that began with its launch in 1977. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Zenit-6 No. 5L re-enter the atmosphere?

Zenit-6 No. 5L re-entered on 24 Oct 1977, according to Orbital Radar's historical catalogue records.

Who operated and built Zenit-6 No. 5L?

Zenit-6 No. 5L was operated by GUKOSR and built by TSSKB (SU).

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