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🛰️ SATELLITE · HISTORICAL RECORD

Suisei

Re-entered 19 Aug 1985

Suisei (NORAD 15967, COSPAR 1985-073A) was a J satellite that re-entered Earth's atmosphere on 19 Aug 1985, launched on 18 Aug 1985 on the PLANET-A mission. It is catalogued as PLANET-A. It was operated by ISAS as part of the ISAS Planet programme. The spacecraft was built by ISASM on the PLANET-A bus, with a mass of 135 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.

1985
launched
1985
re-entered
0
years on orbit
135
kg mass

Lifecycle

Launched18 Aug 1985 · on the PLANET-A mission
Operational22 Feb 1991 · entered service
Retired22 Feb 1991 · end of operational service
Re-entered19 Aug 1985 · atmospheric re-entry — object destroyed

Specifications

NORAD ID15967
COSPAR1985-073A
TypeSatellite
OperatorISAS
Country / StateJ
ManufacturerISASM
BusPLANET-A
Mass135 kg (125 kg dry)
ProgrammeISAS Planet
CategoryPLAN
OrbitHEO (EEO)
Altitude217 × -102,446 km
Inclination31.2°

Frequently asked questions

What happened to Suisei?

Suisei re-entered Earth's atmosphere on 19 Aug 1985, ending a mission that began with its launch in 1985. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Suisei re-enter the atmosphere?

Suisei re-entered on 19 Aug 1985, according to Orbital Radar's historical catalogue records.

Who operated and built Suisei?

Suisei was operated by ISAS and built by ISASM (J).

Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-10-22.