SL-4 R/B, 63521 (Decayed)
Orbit data source: Space-Track
SL-4 R/B, 63521 was space debris in LEO originally from a launch on Tue, 08 Apr 2025 UTC launched from the Tyuratam Missile And Space Complex (TTMTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.
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63521 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
TsSKB-Progress
Mission
Decayed spacecraft
Bus & Motor
BLOK-I, RD-0110
Mass
2,350 kg wet, 2,350 kg dry
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Cyl, 4.5 m
Radar Cross Section
21.560 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 5 months ago
TLE from 5 months ago
0 SL-4 R/B
1 63521U 25072B 25099.97072997 .11558378 12466-4 66070-3 0 9991
2 63521 51.6521 283.9113 0007095 81.8811 43.3667 16.41802781 281Epoch: 2025-04-09T23:17Z
TLE epoch observation values (Epoch: 2025-04-09T23:17:51.069Z)
Latitude
39.93223°
Longitude
-125.18016°
Altitude
161.024 km
Speed
7.817 km/s
True Right ascension
04h 10m 55s
True Declination
39° 44' 51"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
11:39:46
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
166.177 km
Perigee altitude
156.897 km
Semi-major axis
6,539.674 km
Eccentricity
0.00071
Inclination
51.6521°
RAAN
283.9113°
Arg. of periapsis
81.8811°
True anomaly
43.42256°
Mean anomaly
43.3667°
Eccentric anomaly
43.39463°
Mean motion
4.10402 °/min
Orbital period
87.72 mins
BSTAR
0.0006607
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Other satellites on launch #72 in the year 2025 (2025-04-08 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.SL-4 R/B Visibility
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
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| This satellite is decayed. |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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