CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1983-0185
TANSEI 4 (MS-T4)
TANSEI 4 (MS-T4) (NORAD 11706) re-entered Earth’s atmosphere on 12 May 1983, after 3 years, 2 months in orbit.
Official date
NORAD number
11706
International designator
1980-015A
Object type
Spacecraft
Country
Japan
Launched
17 Feb 1980Uchinoura
Re-entered (UTC)
12 May 1983UTC calendar day
Time in orbit
3 years, 2 months1,180 days
How it ended
Re-entered (natural decay)
Latitude range
38.7°N to 38.7°SFinal inclination 38.7°
Mass
185 kg
Operator
ISAS
Built by
ISAS
Bus
MS-T
Programme
Tansei
Where it came down
Latitude band its orbit allowedExact position not recorded
No position was recorded for this re-entry. Its final orbit, inclined at 38.7°, allowed a re-entry anywhere between 38.7°N and 38.7°S.
Life in orbit
3 years, 2 monthsTANSEI 4 (MS-T4)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 12 May 1983
2 entriesFrom the same launch
1980-015
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1983-0185
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1983-0185
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.