Key statistics
Satellite SL-4 R/B at a glance.
Uptime
2
Days in orbit
Revolutions
≈ 16.4
Per day
Orbit
LEO
Low Earth Orbit
Inclination
51.7
Latest
Satellite identification and parameters
Extended collection of information and parameters for SL-4 R/B.
Object identification
Identified? True
Debris? False
Object name: SL-4 R/B
International designator: 2025-146B
Object number (NORAD): 64752
Object ID (CCSDS): 64752
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Decay date: July 5, 2025
Period: 87.702 minutes
Inclination: 51.6522 deg
SMA: 6538.807 km
Apoapsis: 165.675 km
Periapsis: 155.669 km
RAAN: 215.8577 deg
Eccentricy: 0.0007651
Argument of periapsis: 81.6957 deg
Mean anomaly: 88.7713 deg
Mean motion: 16.41931275 rev/day
Mean motion (dot): 0.10330136 rev/day2
B* drag term: 0.00057919 1/REarth
Two-line elements (TLE)
Creation date: July 5, 2025, 1:36 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 5, 2025, 11:43 a.m. UTC
TLE line 0: 0 SL-4 R/B
TLE line 1: 1 64752U 25145B 25186.48862154 .10330136 12471-4 57919-3 0 9991
TLE line 2: 2 64752 51.6522 215.8577 0007651 81.6957 88.7713 16.41931275 279
Live tracking on map
Satellite SL-4 R/B has decayed and is no longer in orbit. No tracking available.
In-orbit conjunctions
Satellite SL-4 R/B has decayed and is no longer in orbit. No conjunctions available.
Associated space launch
Progress resupply mission to the International Space Station.
SL-4 R/B was lifted into orbit during the mission ‘Soyuz 2.1a | Progress MS-31 (92P)’, on board a Soyuz 2.1a space rocket.
The launch took place on July 3, 2025, 7:32 p.m. from 31/6.
For more information about the launch, click the button.
Soyuz 2.1a | Progress MS-31 (92P)
Agency: Russian Federal Space Agency (ROSCOSMOS)
Status: Launch Successful
Launch date: July 3, 2025, 7:32 p.m. UTC
Rocket: Soyuz 2.1a
Launch pad: 31/6
Location: Baikonur Cosmodrome, Republic of Kazakhstan
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