CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1981-0618
SL-4 R/B
SL-4 R/B (NORAD 12990) re-entered Earth’s atmosphere on 8 December 1981, after 4 days in orbit.
Official date
NORAD number
12990
International designator
1981-118B
Object type
Rocket body
Country
USSR
Launched
4 Dec 1981Baikonur Cosmodrome
Re-entered (UTC)
8 Dec 1981UTC calendar day
Time in orbit
4 days4 days
How it ended
Re-entered (natural decay)
Latitude range
65.0°N to 65.0°SFinal inclination 65.0°
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 65.0°, allowed a re-entry anywhere between 65.0°N and 65.0°S.
Life in orbit
4 daysAlso ended on 8 Dec 1981
2 entriesFrom the same launch
1981-118
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1981-0618
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1981-0618
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.