CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1980-0555
SL-4 R/B
SL-4 R/B (NORAD 12101) re-entered Earth’s atmosphere on 20 December 1980, after 4 days in orbit.
Official date
NORAD number
12101
International designator
1980-101B
Object type
Rocket body
Country
USSR
Launched
16 Dec 1980Plesetsk Cosmodrome
Re-entered (UTC)
20 Dec 1980UTC calendar day
Time in orbit
4 days4 days
How it ended
Re-entered (natural decay)
Latitude range
72.8°N to 72.8°SFinal inclination 72.8°
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 72.8°, allowed a re-entry anywhere between 72.8°N and 72.8°S.
Life in orbit
4 daysAlso ended on 20 Dec 1980
2 entriesFrom the same launch
1980-101
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1980-0555
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1980-0555
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.