🛰️ SATELLITE · HISTORICAL RECORD
MS-T3
Retired 1977MS-T3 (NORAD 9841, COSPAR 1977-012A) is a retired J satellite, withdrawn from service around 8 Mar 1977, launched on 19 Feb 1977 on the MS-T3 mission. It was operated by ISAS as part of the Tansei programme. The spacecraft was built by ISAS on the MS-T bus, with a mass of 128 kg. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
1977
launched
1977
retired
49
years on orbit
128
kg mass
Lifecycle
Launched19 Feb 1977 · on the MS-T3 mission
Operational8 Mar 1977 · entered service
Retired8 Mar 1977 · end of operational service
StatusOn orbit (not live-tracked)
Specifications
NORAD ID9841
COSPAR1977-012A
TypeSatellite
OperatorISAS
Country / StateJ
ManufacturerISAS
BusMS-T
Mass128 kg
ProgrammeTansei
CategoryTECH
OrbitMEO (MEO)
Altitude802 × 3,801 km
Inclination65.8°
Frequently asked questions
What happened to MS-T3?
MS-T3 was retired from service around 8 Mar 1977 after launching in 1977. It is no longer operational but remains catalogued.
Who operated and built MS-T3?
MS-T3 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.