HomeLibraryRe-entered SatellitesSA Marsa-2
🛰️ SATELLITE · HISTORICAL RECORD

SA Marsa-2

Re-entered 22 May 1971

SA Marsa-2 (NORAD 5739, COSPAR 1971-045D) was a SU satellite that re-entered Earth's atmosphere on 22 May 1971, launched on 19 May 1971 on the 4M No. 171 mission. It is catalogued as SA. It was operated by IKI / Lavochkin as part of the 3M SA programme. The spacecraft was built by NPOL on the Mars SA bus, with a mass of 645 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.

1971
launched
1971
re-entered
0
years on orbit
645
kg mass

Lifecycle

Launched19 May 1971 · on the 4M No. 171 mission
Operational27 Nov 1971 · entered service
Retired27 Nov 1971 · end of operational service
Re-entered22 May 1971 · atmospheric re-entry — object destroyed

Specifications

NORAD ID5739
COSPAR1971-045D
TypeSatellite
OperatorIKI / Lavochkin
Country / StateSU
ManufacturerNPOL
BusMars SA
Mass645 kg
Programme3M SA
CategoryPLAN/RV
OrbitHEO (EEO)
Inclination51.0°

Frequently asked questions

What happened to SA Marsa-2?

SA Marsa-2 re-entered Earth's atmosphere on 22 May 1971, ending a mission that began with its launch in 1971. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did SA Marsa-2 re-enter the atmosphere?

SA Marsa-2 re-entered on 22 May 1971, according to Orbital Radar's historical catalogue records.

Who operated and built SA Marsa-2?

SA Marsa-2 was operated by IKI / Lavochkin and built by NPOL (SU).

Launched together

4M No. 171Re-entered 1971
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-19.