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🛰️ SATELLITE · HISTORICAL RECORD

Terilen No. 4L

Re-entered 18 Oct 1985

Terilen No. 4L (NORAD 15634, COSPAR 1985-026A) was a SU satellite that re-entered Earth's atmosphere on 18 Oct 1985, launched on 25 Mar 1985 on the Terilen mission. It was operated by GUKOS as part of the Terilen programme. The spacecraft was built by TSSKB on the Yantar'-4KS1 bus, with a mass of 3,390 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.

1985
launched
1985
re-entered
0
years on orbit
3,390
kg mass

Lifecycle

Launched25 Mar 1985 · on the Terilen mission
Operational18 Oct 1985 · entered service
Retired18 Oct 1985 · end of operational service
Re-entered18 Oct 1985 · atmospheric re-entry — object destroyed

Specifications

NORAD ID15634
COSPAR1985-026A
TypeSatellite
OperatorGUKOS
Country / StateSU
ManufacturerTSSKB
BusYantar'-4KS1
Mass3,390 kg
ProgrammeTerilen
CategoryIMG
OrbitLEO (LLEO/I)
Altitude225 × 258 km
Inclination64.8°

Frequently asked questions

What happened to Terilen No. 4L?

Terilen No. 4L re-entered Earth's atmosphere on 18 Oct 1985, ending a mission that began with its launch in 1985. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

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

Terilen No. 4L re-entered on 18 Oct 1985, according to Orbital Radar's historical catalogue records.

Who operated and built Terilen No. 4L?

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

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