CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1986-0545
SL-4 R/B
SL-4 R/B (NORAD 17180) re-entered Earth’s atmosphere on 31 December 1986, after 27 days in orbit.
Official date
NORAD number
17180
International designator
1986-095B
Object type
Rocket body
Country
USSR
Launched
4 Dec 1986Baikonur Cosmodrome
Re-entered (UTC)
31 Dec 1986UTC calendar day
Time in orbit
27 days27 days
How it ended
Re-entered (natural decay)
Latitude range
70.0°N to 70.0°SFinal inclination 70.0°
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 70.0°, allowed a re-entry anywhere between 70.0°N and 70.0°S.
Life in orbit
27 daysSL-4 R/B’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 31 Dec 1986
3 entriesFrom the same launch
1986-095
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1986-0545
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1986-0545
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.