🛰️ SATELLITE · HISTORICAL RECORD
STP P71-2
Retired 2017STP P71-2 (NORAD 5560, COSPAR 1971-089A) is a retired US satellite, withdrawn from service around 1 Dec 2017, launched on 17 Oct 1971 on the ASTEX P71-2 mission. It was operated by STP as part of the STP1 programme. The spacecraft was built by LMSC on the ASTEX bus, with a mass of 800 kg. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
1971
launched
2017
retired
55
years on orbit
800
kg mass
Lifecycle
Launched17 Oct 1971 · on the ASTEX P71-2 mission
Operational1 Jan 1974 · entered service
Retired1 Dec 2017 · end of operational service
StatusOn orbit (not live-tracked)
Specifications
NORAD ID5560
COSPAR1971-089A
TypeSatellite
OperatorSTP
Country / StateUS
ManufacturerLMSC
BusASTEX
Mass800 kg
ProgrammeSTP1
CategorySCI/TECH
OrbitLEO (LEO/P)
Altitude772 × 800 km
Inclination92.7°
Frequently asked questions
What happened to STP P71-2?
STP P71-2 was retired from service around 1 Dec 2017 after launching in 1971. It is no longer operational but remains catalogued.
How long was STP P71-2 operational?
STP P71-2 was operational for roughly 44 years, from 1 Jan 1974 to 1 Dec 2017.
Who operated and built STP P71-2?
STP P71-2 was operated by STP and built by LMSC (US).
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.