HomeLibraryRe-entered SatellitesSTP P70-1
🛰️ SATELLITE · HISTORICAL RECORD

STP P70-1

Re-entered 31 Jan 1982

STP P70-1 (NORAD 5285, COSPAR 1971-054A) was a US satellite that re-entered Earth's atmosphere on 31 Jan 1982, launched on 8 Jun 1971 on the P70-1 mission. It was operated by STP as part of the STP1 programme. The spacecraft was built by BOKT on the P70-1 bus, with a mass of 157 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
1982
re-entered
11
years on orbit
157
kg mass

Lifecycle

Launched8 Jun 1971 · on the P70-1 mission
Operational1 Jan 1972 · entered service
Retired1 Jan 1972 · end of operational service
Re-entered31 Jan 1982 · atmospheric re-entry — object destroyed

Specifications

NORAD ID5285
COSPAR1971-054A
TypeSatellite
OperatorSTP
Country / StateUS
ManufacturerBOKT
BusP70-1
Mass157 kg
ProgrammeSTP1
CategoryAST
OrbitLEO (LLEO/P)
Altitude542 × 579 km
Inclination90.2°

Frequently asked questions

What happened to STP P70-1?

STP P70-1 re-entered Earth's atmosphere on 31 Jan 1982, 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 STP P70-1 re-enter the atmosphere?

STP P70-1 re-entered on 31 Jan 1982, according to Orbital Radar's historical catalogue records.

Who operated and built STP P70-1?

STP P70-1 was operated by STP and built by BOKT (US).

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