CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1985-0092
SL-4 R/B
SL-4 R/B (NORAD 15637) re-entered Earth’s atmosphere on 21 April 1985, after 18 days in orbit.
Official date
NORAD number
15637
International designator
1985-027B
Object type
Rocket body
Country
USSR
Launched
3 Apr 1985Baikonur Cosmodrome
Re-entered (UTC)
21 Apr 1985UTC calendar dayAlso recorded as 22 Apr 1985
Time in orbit
18 days18 days
How it ended
Re-entered (natural decay)
Latitude range
70.3°N to 70.3°SFinal inclination 70.3°
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 70.3°, allowed a re-entry anywhere between 70.3°N and 70.3°S.
Life in orbit
18 daysFrom the same launch
1985-027
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1985-0092
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1985-0092
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.