CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1980-0376
SL-4 R/B
SL-4 R/B (NORAD 11978) re-entered Earth’s atmosphere on 21 September 1980, after 3 days in orbit.
Official date
NORAD number
11978
International designator
1980-075B
Object type
Rocket body
Country
USSR
Launched
18 Sep 1980Baikonur Cosmodrome
Re-entered (UTC)
21 Sep 1980UTC calendar day
Time in orbit
3 days3 days
How it ended
Re-entered (natural decay)
Latitude range
51.6°N to 51.6°SFinal inclination 51.6°
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 51.6°, allowed a re-entry anywhere between 51.6°N and 51.6°S.
Life in orbit
3 daysAlso ended on 21 Sep 1980
2 entriesFrom the same launch
1980-075
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1980-0376
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1980-0376
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.