CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1986-0045
SL-4 R/B
SL-4 R/B (NORAD 16491) re-entered Earth’s atmosphere on 21 January 1986, after 6 days in orbit.
Official date
NORAD number
16491
International designator
1986-004B
Object type
Rocket body
Country
USSR
Launched
15 Jan 1986Plesetsk Cosmodrome
Re-entered (UTC)
21 Jan 1986UTC calendar day
Time in orbit
6 days6 days
How it ended
Re-entered (natural decay)
Latitude range
67.1°N to 67.1°SFinal inclination 67.1°
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 67.1°, allowed a re-entry anywhere between 67.1°N and 67.1°S.
Life in orbit
6 daysAlso ended on 21 Jan 1986
3 entriesFrom the same launch
1986-004
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1986-0045
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1986-0045
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.