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🛰️ SATELLITE · HISTORICAL RECORD

Vela 5B

Re-entered 30 Sep 1983

Vela 5B (NORAD 3955, COSPAR 1969-046E) was a US satellite that re-entered Earth's atmosphere on 30 Sep 1983, launched on 23 May 1969 on the ERS 29 mission. It was operated by SAMSO as part of the Vela programme. The spacecraft was built by TRW on the Vela bus, with a mass of 250 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
1983
re-entered
14
years on orbit
250
kg mass

Lifecycle

Launched23 May 1969 · on the ERS 29 mission
Operational1 Mar 1980 · entered service
Retired1 Mar 1980 · end of operational service
Re-entered30 Sep 1983 · atmospheric re-entry — object destroyed

Specifications

NORAD ID3955
COSPAR1969-046E
TypeSatellite
OperatorSAMSO
Country / StateUS
ManufacturerTRW
BusVela
Mass250 kg
ProgrammeVela
CategoryEW
Orbit (VHEO)
Altitude110,741 × 112,014 km
Inclination33.1°

Frequently asked questions

What happened to Vela 5B?

Vela 5B re-entered Earth's atmosphere on 30 Sep 1983, 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 Vela 5B re-enter the atmosphere?

Vela 5B re-entered on 30 Sep 1983, according to Orbital Radar's historical catalogue records.

Who operated and built Vela 5B?

Vela 5B was operated by SAMSO and built by TRW (US).

Launched together

ERS 29NORAD 3950ERS 26NORAD 3951ERS 22NORAD 3952Vela 5ARe-entered 1984
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.