CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1981-0228
SL-4 R/B
SL-4 R/B (NORAD 12424) re-entered Earth’s atmosphere on 6 May 1981, after 8 days in orbit.
Official date
NORAD number
12424
International designator
1981-040B
Object type
Rocket body
Country
USSR
Launched
28 Apr 1981Baikonur Cosmodrome
Re-entered (UTC)
6 May 1981UTC calendar day
Time in orbit
8 days8 days
How it ended
Re-entered (natural decay)
Latitude range
70.4°N to 70.4°SFinal inclination 70.4°
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 70.4°, allowed a re-entry anywhere between 70.4°N and 70.4°S.
Life in orbit
8 daysAlso ended on 6 May 1981
1 entryFrom the same launch
1981-040
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1981-0228
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1981-0228
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.