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🛰️ SATELLITE · HISTORICAL RECORD

Siluet No. 4L

Re-entered 17 Dec 1984

Siluet No. 4L (NORAD 15393, COSPAR 1984-116A) was a SU satellite that re-entered Earth's atmosphere on 17 Dec 1984, launched on 14 Nov 1984 on the Siluet No. 4 mission. It was operated by TSSKB as part of the Siluet programme. The spacecraft was built by TSSKB on the Yantar'-1KFT bus, with a mass of 2,720 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.

1984
launched
1984
re-entered
0
years on orbit
2,720
kg mass

Lifecycle

Launched14 Nov 1984 · on the Siluet No. 4 mission
Operational17 Dec 1984 · entered service
Retired17 Dec 1984 · end of operational service
Re-entered17 Dec 1984 · atmospheric re-entry — object destroyed

Specifications

NORAD ID15393
COSPAR1984-116A
TypeSatellite
OperatorTSSKB
Country / StateSU
ManufacturerTSSKB
BusYantar'-1KFT
Mass2,720 kg
ProgrammeSiluet
CategoryIMG
OrbitLEO (LLEO/I)
Altitude208 × 278 km
Inclination70.0°

Frequently asked questions

What happened to Siluet No. 4L?

Siluet No. 4L re-entered Earth's atmosphere on 17 Dec 1984, ending a mission that began with its launch in 1984. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Siluet No. 4L re-enter the atmosphere?

Siluet No. 4L re-entered on 17 Dec 1984, according to Orbital Radar's historical catalogue records.

Who operated and built Siluet No. 4L?

Siluet No. 4L was operated by TSSKB and built by TSSKB (SU).

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