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🛰️ SATELLITE · HISTORICAL RECORD

Pioneer A

Re-entered 18 Dec 1965

Pioneer A (NORAD 1841, COSPAR 1965-105A) was a US satellite that re-entered Earth's atmosphere on 18 Dec 1965, launched on 16 Dec 1965 on the Pioneer A mission. It was operated by ARC as part of the Solar Pioneer programme. The spacecraft was built by TRW on the Solar Pioneer bus, with a mass of 63 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.

1965
launched
1965
re-entered
0
years on orbit
63
kg mass

Lifecycle

Launched16 Dec 1965 · on the Pioneer A mission
Operational1 Jan 1975 · entered service
Retired8 Dec 2000 · end of operational service
Re-entered18 Dec 1965 · atmospheric re-entry — object destroyed

Specifications

NORAD ID1841
COSPAR1965-105A
TypeSatellite
OperatorARC
Country / StateUS
ManufacturerTRW
BusSolar Pioneer
Mass63 kg
ProgrammeSolar Pioneer
CategoryPLAN
OrbitHEO (EEO)
Altitude558 × -291,996 km
Inclination30.2°

Frequently asked questions

What happened to Pioneer A?

Pioneer A re-entered Earth's atmosphere on 18 Dec 1965, ending a mission that began with its launch in 1965. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Pioneer A re-enter the atmosphere?

Pioneer A re-entered on 18 Dec 1965, according to Orbital Radar's historical catalogue records.

How long was Pioneer A operational?

Pioneer A was operational for roughly 26 years, from 1 Jan 1975 to 8 Dec 2000.

Who operated and built Pioneer A?

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

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