CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1973-0417
SL-4 DEB
SL-4 DEB (NORAD 6821) re-entered Earth’s atmosphere on 7 September 1973.
Official dateFragment record
NORAD number
6821
International designator
1973-063D
Object type
Fragment
Country
USSR
Parent launched
6 Sep 1973Plesetsk Cosmodrome
Re-entered (UTC)
7 Sep 1973UTC calendar day
Time since launch
1 day1 days
How it ended
Re-entered (natural decay)
Latitude range
72.9°N to 72.9°SFinal inclination 72.9°
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 72.9°, allowed a re-entry anywhere between 72.9°N and 72.9°S.
Life in orbit
Also ended on 7 Sep 1973
1 entryFrom the same launch
1973-063
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1973-0417
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1973-0417
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.