CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1986-0182
SL-4 R/B
SL-4 R/B (NORAD 16680) re-entered Earth’s atmosphere on 27 April 1986, after 12 days in orbit.
Official date
NORAD number
16680
International designator
1986-029B
Object type
Rocket body
Country
USSR
Launched
15 Apr 1986Plesetsk Cosmodrome
Re-entered (UTC)
27 Apr 1986UTC calendar day
Time in orbit
12 days12 days
How it ended
Re-entered (natural decay)
Latitude range
72.9°N to 72.9°SFinal inclination 72.9°
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 72.9°, allowed a re-entry anywhere between 72.9°N and 72.9°S.
Life in orbit
12 daysAlso ended on 27 Apr 1986
1 entryFrom the same launch
1986-029
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1986-0182
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1986-0182
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.