CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
2015-0304
SL-6 R/B(2)
SL-6 R/B(2) (NORAD 6939) re-entered Earth’s atmosphere on 29 June 2015, after 41 years, 7 months in orbit.
Official date
NORAD number
6939
International designator
1973-084D
Object type
Rocket body
Country
USSR
Launched
2 Nov 1973Plesetsk Cosmodrome
Re-entered (UTC)
29 Jun 2015Recorded time 05:30 UTC
Time in orbit
41 years, 7 months15,214 days
How it ended
Re-entered (natural decay)
Latitude range
60.9°N to 60.9°SFinal inclination 60.9°
Mass
4,500 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 60.9°, allowed a re-entry anywhere between 60.9°N and 60.9°S.
Life in orbit
41 years, 7 monthsSL-6 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 29 Jun 2015
3 entriesFrom the same launch
1973-084
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/2015-0304
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/2015-0304
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.