🛰️ SATELLITE · HISTORICAL RECORD
MS-T1
Retired 1971MS-T1 (NORAD 4952, COSPAR 1971-011A) is a retired J satellite, withdrawn from service around 23 Feb 1971, launched on 16 Feb 1971 on the MS-T1 mission. It was operated by ISAS as part of the Tansei programme. The spacecraft was built by ISAS on the ISAS MS bus, with a mass of 63 kg. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
1971
launched
1971
retired
55
years on orbit
63
kg mass
Lifecycle
Launched16 Feb 1971 · on the MS-T1 mission
Operational23 Feb 1971 · entered service
Retired23 Feb 1971 · end of operational service
StatusOn orbit (not live-tracked)
Specifications
NORAD ID4952
COSPAR1971-011A
TypeSatellite
OperatorISAS
Country / StateJ
ManufacturerISAS
BusISAS MS
Mass63 kg
ProgrammeTansei
CategoryTECH
OrbitLEO (LEO/I)
Altitude985 × 1,105 km
Inclination29.7°
Frequently asked questions
What happened to MS-T1?
MS-T1 was retired from service around 23 Feb 1971 after launching in 1971. It is no longer operational but remains catalogued.
Who operated and built MS-T1?
MS-T1 was operated by ISAS and built by ISAS (J).
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.