CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1977-0370
SL-4 R/B
SL-4 R/B (NORAD 10300) re-entered Earth’s atmosphere on 7 September 1977, after 11 days in orbit.
Official date
NORAD number
10300
International designator
1977-081B
Object type
Rocket body
Country
USSR
Launched
27 Aug 1977Plesetsk Cosmodrome
Re-entered (UTC)
7 Sep 1977UTC calendar day
Time in orbit
11 days11 days
How it ended
Re-entered (natural decay)
Latitude range
72.8°N to 72.8°SFinal inclination 72.8°
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 72.8°, allowed a re-entry anywhere between 72.8°N and 72.8°S.
Life in orbit
11 daysAlso ended on 7 Sep 1977
4 entriesFrom the same launch
1977-081
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1977-0370
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1977-0370
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.