CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1981-0173
SL-11 DEB
SL-11 DEB (NORAD 4927) re-entered Earth’s atmosphere on 18 April 1981.
Official dateFragment record
NORAD number
4927
International designator
1971-010C
Object type
Fragment
Country
USSR
Parent launched
9 Feb 1971Plesetsk Cosmodrome
Re-entered (UTC)
18 Apr 1981UTC calendar day
Time since launch
10 years, 2 months3,721 days
How it ended
Re-entered (natural decay)
Latitude range
65.8°N to 65.8°SFinal inclination 65.8°
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 65.8°, allowed a re-entry anywhere between 65.8°N and 65.8°S.
Life in orbit
SL-11 DEB’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1971-010
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1981-0173
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1981-0173
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.