CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1973-0084
SL-13 R/B
SL-13 R/B (NORAD 6399) re-entered Earth’s atmosphere on 6 April 1973, after 3 days in orbit.
Official date
NORAD number
6399
International designator
1973-017B
Object type
Rocket body
Country
USSR
Launched
3 Apr 1973Baikonur Cosmodrome
Re-entered (UTC)
6 Apr 1973UTC calendar day
Time in orbit
3 days3 days
How it ended
Re-entered (natural decay)
Latitude range
51.5°N to 51.5°SFinal inclination 51.5°
Mass
4,185 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 51.5°, allowed a re-entry anywhere between 51.5°N and 51.5°S.
Life in orbit
3 daysAlso ended on 6 Apr 1973
3 entriesFrom the same launch
1973-017
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1973-0084
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1973-0084
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.