CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1975-0476
SL-4 R/B
SL-4 R/B (NORAD 8451) re-entered Earth’s atmosphere on 23 December 1975, after 28 days in orbit.
Official date
NORAD number
8451
International designator
1975-110B
Object type
Rocket body
Country
USSR
Launched
25 Nov 1975Plesetsk Cosmodrome
Re-entered (UTC)
23 Dec 1975UTC calendar day
Time in orbit
28 days28 days
How it ended
Re-entered (natural decay)
Latitude range
62.8°N to 62.8°SFinal inclination 62.8°
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 62.8°, allowed a re-entry anywhere between 62.8°N and 62.8°S.
Life in orbit
28 daysSL-4 R/B’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1975-110
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1975-0476
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1975-0476
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.