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Tselina-OK No. 1?

Re-entered 26 Nov 1980

Tselina-OK No. 1? (NORAD 8444, COSPAR 1975-109A) was a SU satellite that re-entered Earth's atmosphere on 26 Nov 1980, launched on 21 Nov 1975 on the Tselina-OK mission. It was operated by GRU as part of the Tselina-OK programme. The spacecraft was built by YUZH on the Tselina-OM bus, with a mass of 434 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.

1975
launched
1980
re-entered
5
years on orbit
434
kg mass

Lifecycle

Launched21 Nov 1975 · on the Tselina-OK mission
Operational1 Jan 1976 · entered service
Retired1 Jan 1976 · end of operational service
Re-entered26 Nov 1980 · atmospheric re-entry — object destroyed

Specifications

NORAD ID8444
COSPAR1975-109A
TypeSatellite
OperatorGRU
Country / StateSU
ManufacturerYUZH
BusTselina-OM
Mass434 kg
ProgrammeTselina-OK
CategorySIG
OrbitLEO (LLEO/I)
Altitude505 × 548 km
Inclination74.0°

Frequently asked questions

What happened to Tselina-OK No. 1??

Tselina-OK No. 1? re-entered Earth's atmosphere on 26 Nov 1980, ending a mission that began with its launch in 1975. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Tselina-OK No. 1? re-enter the atmosphere?

Tselina-OK No. 1? re-entered on 26 Nov 1980, according to Orbital Radar's historical catalogue records.

Who operated and built Tselina-OK No. 1??

Tselina-OK No. 1? was operated by GRU and built by YUZH (SU).

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