CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0221
M-3S R/B
M-3S R/B (NORAD 12308) re-entered Earth’s atmosphere on 26 May 1991, after 10 years, 3 months in orbit.
Official date
NORAD number
12308
International designator
1981-017B
Object type
Rocket body
Country
Japan
Launched
21 Feb 1981Uchinoura
Re-entered (UTC)
26 May 1991UTC calendar day
Time in orbit
10 years, 3 months3,746 days
How it ended
Re-entered (natural decay)
Latitude range
31.3°N to 31.3°SFinal inclination 31.3°
Mass
142 kg
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 31.3°, allowed a re-entry anywhere between 31.3°N and 31.3°S.
Life in orbit
10 years, 3 monthsM-3S R/B’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 26 May 1991
3 entriesFrom the same launch
1981-017
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0221
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0221
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.