Home›Library›Satellite Directory›Pioneer 11
🛰️ SATELLITE · HISTORICAL RECORD

Pioneer 11

Re-entered 6 Apr 1973

Pioneer 11 (NORAD 6421, COSPAR 1973-019A) was a US satellite that re-entered Earth's atmosphere on 6 Apr 1973, launched on 6 Apr 1973 on the Pioneer G mission. It is catalogued as Pioneer G. It was operated by ARC as part of the Pioneer J programme. The spacecraft was built by TRW on the Pioneer F bus, with a mass of 270 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.

1973
launched
1973
re-entered
0
years on orbit
270
kg mass

Lifecycle

Launched6 Apr 1973 · on the Pioneer G mission
Operational1 Nov 1995 · entered service
Retired1 Nov 1995 · end of operational service
Re-entered6 Apr 1973 · atmospheric re-entry — object destroyed

Specifications

NORAD ID6421
COSPAR1973-019A
TypeSatellite
OperatorARC
Country / StateUS
ManufacturerTRW
BusPioneer F
Mass270 kg (243 kg dry)
ProgrammePioneer J
CategoryPLAN
OrbitHEO (EEO)
Altitude229 × -22,043 km
Inclination34.9°

Frequently asked questions

What happened to Pioneer 11?

Pioneer 11 re-entered Earth's atmosphere on 6 Apr 1973, ending a mission that began with its launch in 1973. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Pioneer 11 re-enter the atmosphere?

Pioneer 11 re-entered on 6 Apr 1973, according to Orbital Radar's historical catalogue records.

Who operated and built Pioneer 11?

Pioneer 11 was operated by ARC and built by TRW (US).

Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-10-21.