CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1973-0116
SL-4 R/B
SL-4 R/B (NORAD 6441) re-entered Earth’s atmosphere on 28 April 1973, after 3 days in orbit.
Official date
NORAD number
6441
International designator
1973-024B
Object type
Rocket body
Country
USSR
Launched
25 Apr 1973Plesetsk Cosmodrome
Re-entered (UTC)
28 Apr 1973UTC calendar day
Time in orbit
3 days3 days
How it ended
Re-entered (natural decay)
Latitude range
81.3°N to 81.3°SFinal inclination 81.3°
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 81.3°, allowed a re-entry anywhere between 81.3°N and 81.3°S.
Life in orbit
3 daysFrom the same launch
1973-024
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1973-0116
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1973-0116
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.