CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0078
SL-4 R/B
SL-4 R/B (NORAD 21117) re-entered Earth’s atmosphere on 19 February 1991, after 4 days in orbit.
Official date
NORAD number
21117
International designator
1991-011B
Object type
Rocket body
Country
USSR
Launched
15 Feb 1991Baikonur Cosmodrome
Re-entered (UTC)
19 Feb 1991UTC calendar day
Time in orbit
4 days4 days
How it ended
Re-entered (natural decay)
Latitude range
64.7°N to 64.7°SFinal inclination 64.7°
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 64.7°, allowed a re-entry anywhere between 64.7°N and 64.7°S.
Life in orbit
4 daysFrom the same launch
1991-011
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0078
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0078
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.