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Tselina-OM No. 2L

Re-entered 21 Oct 1978

Tselina-OM No. 2L (NORAD 3775, COSPAR 1969-021A) was a SU satellite that re-entered Earth's atmosphere on 21 Oct 1978, launched on 5 Mar 1969 on the Tselina-OM mission. It was operated by TSUKOS as part of the Tselina-OM 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.

1969
launched
1978
re-entered
9
years on orbit
434
kg mass

Lifecycle

Launched5 Mar 1969 · on the Tselina-OM mission
Operational1 Jan 1970 · entered service
Retired1 Jan 1970 · end of operational service
Re-entered21 Oct 1978 · atmospheric re-entry — object destroyed

Specifications

NORAD ID3775
COSPAR1969-021A
TypeSatellite
OperatorTSUKOS
Country / StateSU
ManufacturerYUZH
BusTselina-OM
Mass434 kg
ProgrammeTselina-OM
CategorySIG
OrbitLEO (LLEO/I)
Altitude520 × 541 km
Inclination74.0°

Frequently asked questions

What happened to Tselina-OM No. 2L?

Tselina-OM No. 2L re-entered Earth's atmosphere on 21 Oct 1978, ending a mission that began with its launch in 1969. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Tselina-OM No. 2L re-enter the atmosphere?

Tselina-OM No. 2L re-entered on 21 Oct 1978, according to Orbital Radar's historical catalogue records.

Who operated and built Tselina-OM No. 2L?

Tselina-OM No. 2L was operated by TSUKOS and built by YUZH (SU).

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