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Molniya-1Yu No. 15L

Re-entered 9 Jul 1973

Molniya-1Yu No. 15L (NORAD 3619, COSPAR 1968-115A) was a SU satellite that re-entered Earth's atmosphere on 9 Jul 1973, launched on 16 Dec 1968 on the Molniya-1Yu 11F67 No. 15 mission. It was operated by TSUKOS as part of the Molniya-1 programme. The spacecraft was built by OKB10 on the Molniya-1 bus, with a mass of 1,650 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.

1968
launched
1973
re-entered
5
years on orbit
1,650
kg mass

Lifecycle

Launched16 Dec 1968 · on the Molniya-1Yu 11F67 No. 15 mission
Operational1 Jan 1969 · entered service
Retired1 Jan 1969 · end of operational service
Re-entered9 Jul 1973 · atmospheric re-entry — object destroyed

Specifications

NORAD ID3619
COSPAR1968-115A
TypeSatellite
OperatorTSUKOS
Country / StateSU
ManufacturerOKB10
BusMolniya-1
Mass1,650 kg (1,620 kg dry)
ProgrammeMolniya-1
CategoryCOM
OrbitHEO (GTO)
Altitude522 × 39,559 km
Inclination65.0°

Frequently asked questions

What happened to Molniya-1Yu No. 15L?

Molniya-1Yu No. 15L re-entered Earth's atmosphere on 9 Jul 1973, ending a mission that began with its launch in 1968. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Molniya-1Yu No. 15L re-enter the atmosphere?

Molniya-1Yu No. 15L re-entered on 9 Jul 1973, according to Orbital Radar's historical catalogue records.

Who operated and built Molniya-1Yu No. 15L?

Molniya-1Yu No. 15L was operated by TSUKOS and built by OKB10 (SU).

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