CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0454
SL-4 R/B
SL-4 R/B (NORAD 21747) re-entered Earth’s atmosphere on 18 October 1991, after 1 day in orbit.
Official date
NORAD number
21747
International designator
1991-073B
Object type
Rocket body
Country
USSR
Launched
17 Oct 1991Baikonur Cosmodrome
Re-entered (UTC)
18 Oct 1991UTC calendar day
Time in orbit
1 day1 days
How it ended
Re-entered (natural decay)
Latitude range
51.6°N to 51.6°SFinal inclination 51.6°
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 51.6°, allowed a re-entry anywhere between 51.6°N and 51.6°S.
Life in orbit
1 dayAlso ended on 18 Oct 1991
1 entryFrom the same launch
1991-073
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0454
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0454
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.