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: 11 hours ago
TLE from 11 hours ago
0 COSMOS 252 DEB
1 03900U 68097BM 26174.82362661 .00007659 00000-0 66740-3 0 9999
2 03900 62.1987 325.0453 0176477 257.9972 100.1286 14.86405358890528Epoch: 2026-06-23T19:46Z
TLE epoch observation values (Epoch: 2026-06-23T19:46:01.339Z)
Latitude
0.00003°
Longitude
116.55008°
Altitude
634.741 km
Speed
7.529 km/s
True Right ascension
21h 40m 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
17:50:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
731.378 km
Perigee altitude
484.796 km
Semi-major axis
6,986.224 km
Eccentricity
0.01765
Inclination
62.1987°
RAAN
325.0453°
Arg. of periapsis
257.9972°
True anomaly
102.11127°
Mean anomaly
100.1286°
Eccentric anomaly
101.12075°
Mean motion
3.71689 °/min
Orbital period
96.86 mins
BSTAR
0.0006674
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-06-24 12:03:58.565Z | 216.318° SW | 2026-06-24 12:07:58.565Z | 22.627° NE | 43.953° | 2026-06-24 12:11:58.565Z | 34.8° NE |
| 4 mins | 2026-06-24 13:46:58.565Z | 305.962° NW | 2026-06-24 13:47:58.565Z | 320.054° NNW | 16.43° | 2026-06-24 13:50:58.565Z | 359.387° N |
| 4 mins | 2026-06-24 18:53:58.565Z | 13.356° NNE | 2026-06-24 18:55:58.565Z | 43.535° NE | 17.361° | 2026-06-24 18:57:58.565Z | 71.211° E |
| 7 mins | 2026-06-24 20:32:58.565Z | 320.921° NNW | 2026-06-24 20:35:58.565Z | 271.852° WNW | 44.408° | 2026-06-24 20:39:58.565Z | 150.412° SSE |
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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