CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1979-0617
SL-4 R/B
SL-4 R/B (NORAD 11639) re-entered Earth’s atmosphere on 19 December 1979, after 7 days in orbit.
Official date
NORAD number
11639
International designator
1979-102B
Object type
Rocket body
Country
USSR
Launched
12 Dec 1979Plesetsk Cosmodrome
Re-entered (UTC)
19 Dec 1979UTC calendar day
Time in orbit
7 days7 days
How it ended
Re-entered (natural decay)
Latitude range
72.8°N to 72.8°SFinal inclination 72.8°
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 72.8°, allowed a re-entry anywhere between 72.8°N and 72.8°S.
Life in orbit
7 daysFrom the same launch
1979-102
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1979-0617
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1979-0617
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.