CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1971-0314
SL-6 R/B(1)
SL-6 R/B(1) (NORAD 5617) re-entered Earth’s atmosphere on 19 December 1971, after 25 days in orbit.
Official date
NORAD number
5617
International designator
1971-100B
Object type
Rocket body
Country
USSR
Launched
24 Nov 1971Plesetsk Cosmodrome
Re-entered (UTC)
19 Dec 1971UTC calendar day
Time in orbit
25 days25 days
How it ended
Re-entered (natural decay)
Latitude range
65.4°N to 65.4°SFinal inclination 65.4°
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 65.4°, allowed a re-entry anywhere between 65.4°N and 65.4°S.
Life in orbit
25 daysSL-6 R/B(1)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 19 Dec 1971
2 entriesFrom the same launch
1971-100
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1971-0314
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1971-0314
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.