CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1971-0243
SL-4 DEB
SL-4 DEB (NORAD 5539) re-entered Earth’s atmosphere on 10 October 1971.
Official dateFragment record
NORAD number
5539
International designator
1971-085D
Object type
Fragment
Country
USSR
Parent launched
7 Oct 1971Plesetsk Cosmodrome
Re-entered (UTC)
10 Oct 1971UTC calendar day
Time since launch
3 days3 days
How it ended
Re-entered (natural decay)
Latitude range
65.5°N to 65.5°SFinal inclination 65.5°
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 65.5°, allowed a re-entry anywhere between 65.5°N and 65.5°S.
Life in orbit
Also ended on 10 Oct 1971
2 entriesFrom the same launch
1971-085
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1971-0243
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1971-0243
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.