CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
2025-0817
SL-4 R/B
SL-4 R/B (NORAD 61731) re-entered Earth’s atmosphere on 16 April 2025 over the Southern Ocean, after 5 months in orbit.
Official date
NORAD number
61731
International designator
2024-197B
Object type
Rocket body
Country
Russia
Launched
31 Oct 2024Plesetsk Cosmodrome
Re-entered (UTC)
16 Apr 2025Recorded time 13:47 UTC
Time in orbit
5 months167 days
How it ended
Re-entered (natural decay)
Latitude range
82.5°N to 82.5°SFinal inclination 97.5°
Mass
2,350 kg
Where it came down
Recorded positionRecorded position 67.0°S, 145.0°E at 13:47 UTC. Its final orbit, inclined at 97.5°, allowed a re-entry anywhere between 82.5°N and 82.5°S.
Life in orbit
5 monthsSL-4 R/B’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 16 Apr 2025
3 entries
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/2025-0817
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/2025-0817
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.