CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1981-0572
SL-4 R/B
SL-4 R/B (NORAD 12937) re-entered Earth’s atmosphere on 6 November 1981, after 3 days in orbit.
Official date
NORAD number
12937
International designator
1981-109B
Object type
Rocket body
Country
USSR
Launched
3 Nov 1981Plesetsk Cosmodrome
Re-entered (UTC)
6 Nov 1981UTC calendar day
Time in orbit
3 days3 days
How it ended
Re-entered (natural decay)
Latitude range
67.1°N to 67.1°SFinal inclination 67.1°
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 67.1°, allowed a re-entry anywhere between 67.1°N and 67.1°S.
Life in orbit
3 daysAlso ended on 6 Nov 1981
3 entriesFrom the same launch
1981-109
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1981-0572
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1981-0572
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.