CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
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Entry no.
2025-0771

SL-4 R/B

SL-4 R/B (NORAD 63521) re-entered Earth’s atmosphere on 10 April 2025 over the South Pacific Ocean, after 2 days in orbit.

Official date
NORAD number
63521
International designator
2025-072B
Object type
Rocket body
Country
Russia
Launched
8 Apr 2025Baikonur Cosmodrome
Re-entered (UTC)
10 Apr 2025Recorded time 10:43 UTC
Time in orbit
2 days2 days
How it ended
Re-entered (natural decay)
Latitude range
51.7°N to 51.7°SFinal inclination 51.7°
Mass
2,350 kg

Where it came down

Recorded position

Recorded position 12.0°S, 171.0°E at 10:43 UTC. Its final orbit, inclined at 51.7°, allowed a re-entry anywhere between 51.7°N and 51.7°S.

Life in orbit

2 days

Also ended on 10 Apr 2025

14 entries
2025-0761STARLINK-12352025-0762STARLINK-22952025-0763STARLINK-30532025-0766STARLINK-60572025-0767FLOCK 4Q 322025-0769Naxing-4A2025-0757SL-6 R/B(2)2025-0760CZ-2C R/B2025-0758SL-8 DEB *2025-0759FENGYUN 1C DEB2025-0764COSMOS 1408 DEB2025-0765CZ-6A DEB+2 more

From the same launch

2025-072
2025-0789OBJECT C2025-1847SOYUZ MS-27
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Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/2025-0771
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