CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
2019-0320
SL-6 R/B(2)
SL-6 R/B(2) (NORAD 9850) re-entered Earth’s atmosphere on 11 December 2019 over the South Pacific Ocean, after 42 years, 10 months in orbit.
Official date
NORAD number
9850
International designator
1977-010E
Object type
Rocket body
Country
USSR
Launched
11 Feb 1977Plesetsk Cosmodrome
Re-entered (UTC)
11 Dec 2019Recorded time 03:12 UTC
Time in orbit
42 years, 10 months15,643 days
How it ended
Re-entered (natural decay)
Latitude range
61.5°N to 61.5°SFinal inclination 61.5°
Mass
4,500 kg
Where it came down
Recorded positionRecorded position 43.0°S, 85.0°W at 03:12 UTC. Its final orbit, inclined at 61.5°, allowed a re-entry anywhere between 61.5°N and 61.5°S.
Life in orbit
42 years, 10 monthsSL-6 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 11 Dec 2019
2 entriesFrom the same launch
1977-010
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/2019-0320
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/2019-0320
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.