CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1980-0352
SL-4 R/B
SL-4 R/B (NORAD 11951) re-entered Earth’s atmosphere on 7 September 1980, after 4 days in orbit.
Official date
NORAD number
11951
International designator
1980-072B
Object type
Rocket body
Country
USSR
Launched
3 Sep 1980Plesetsk Cosmodrome
Re-entered (UTC)
7 Sep 1980UTC calendar dayAlso recorded as 8 Sep 1980
Time in orbit
4 days4 days
How it ended
Re-entered (natural decay)
Latitude range
82.3°N to 82.3°SFinal inclination 82.3°
Mass
2,350 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 82.3°, allowed a re-entry anywhere between 82.3°N and 82.3°S.
Life in orbit
4 daysAlso ended on 7 Sep 1980
1 entryFrom the same launch
1980-072
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1980-0352
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1980-0352
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.