CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
2018-0083
JIKIKEN (EXOS-B)
JIKIKEN (EXOS-B) (NORAD 11027) re-entered Earth’s atmosphere on 23 April 2018, after 39 years, 7 months in orbit.
Official date
NORAD number
11027
International designator
1978-087A
Object type
Spacecraft
Country
Japan
Launched
16 Sep 1978Uchinoura
Re-entered (UTC)
23 Apr 2018UTC calendar dayAlso recorded as 22 Apr 2018
Time in orbit
39 years, 7 months14,464 days
How it ended
Re-entered (natural decay)
Latitude range
31.0°N to 31.0°SFinal inclination 31.0°
Mass
90 kg
Operator
ISAS
Built by
ISAS
Bus
EXOS-B
Programme
EXOS
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 31.0°, allowed a re-entry anywhere between 31.0°N and 31.0°S.
Life in orbit
39 years, 7 monthsJIKIKEN (EXOS-B)’s lowest and highest points above Earth, week by week, from its tracking history.
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/2018-0083
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/2018-0083
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.