COSMOS 252 DEB, 3900
Orbit data source: Space-Track
COSMOS 252 DEB, 3900 is space debris in LEO originally from a launch on Fri, 01 Nov 1968 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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3900 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
Unknown
Mission
Spacecraft
Bus & Motor
Unknown
Mass
Unknown
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Unknown shape, 0.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 13 hours ago
TLE from 13 hours ago
0 COSMOS 252 DEB
1 03900U 68097BM 26236.49229538 .00005199 00000-0 45172-3 0 9999
2 03900 62.1971 116.5435 0174209 280.6001 77.5505 14.87295132899697Epoch: 2026-08-24T11:48Z
TLE epoch observation values (Epoch: 2026-08-24T11:48:54.320Z)
Latitude
-0.00002°
Longitude
-33.45606°
Altitude
583.969 km
Speed
7.582 km/s
True Right ascension
07h 46m 10s
True Declination
0° 00' 00"
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
15:53:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
726.958 km
Perigee altitude
483.642 km
Semi-major axis
6,983.437 km
Eccentricity
0.01742
Inclination
62.1971°
RAAN
116.5435°
Arg. of periapsis
280.6001°
True anomaly
79.50866°
Mean anomaly
77.5505°
Eccentric anomaly
78.52871°
Mean motion
3.71911 °/min
Orbital period
96.8 mins
BSTAR
0.00045172
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Other satellites on launch #97 in the year 1968 (1968-11-01 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.COSMOS 252 DEB Visibility forecast
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-08-25 01:13:51.585Z | 354.744° N | 2026-08-25 01:16:51.585Z | 36.141° NE | 20.68° | 2026-08-25 01:20:51.585Z | 89.991° E |
| 8 mins | 2026-08-25 02:53:51.585Z | 315.387° NNW | 2026-08-25 02:57:51.585Z | 209.367° SW | 41.267° | 2026-08-25 03:01:51.585Z | 158.13° S |
| 6 mins | 2026-08-25 16:59:51.585Z | 163.683° S | 2026-08-25 17:02:51.585Z | 110.655° ESE | 24.835° | 2026-08-25 17:05:51.585Z | 64.158° ENE |
| 7 mins | 2026-08-25 18:39:51.585Z | 257.864° W | 2026-08-25 18:42:51.585Z | 326.345° NNW | 31.574° | 2026-08-25 18:46:51.585Z | 21.38° NNE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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