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
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 5 hours ago
TLE from 5 hours ago
0 COSMOS 252 DEB
1 3900U 68097BM 26122.06982792 .00009973 00000-0 86536-3 0 9997
2 3900 62.1958 143.1787 0181414 239.0196 119.2958 14.85714826882688Epoch: 2026-05-02T01:40Z
TLE epoch observation values (Epoch: 2026-05-02T01:40:33.132Z)
Latitude
-0.00002°
Longitude
-101.95238°
Altitude
676.895 km
Speed
7.485 km/s
True Right ascension
09h 32m 42s
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
14:41:34
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
737.032 km
Perigee altitude
483.474 km
Semi-major axis
6,988.39 km
Eccentricity
0.01814
Inclination
62.1958°
RAAN
143.1787°
Arg. of periapsis
239.0196°
True anomaly
121.08858°
Mean anomaly
119.2958°
Eccentric anomaly
120.1942°
Mean motion
3.71516 °/min
Orbital period
96.9 mins
BSTAR
0.00086536
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-05-02 10:15:12.209Z | 357.211° N | 2026-05-02 10:18:12.209Z | 35.511° NE | 15.154° | 2026-05-02 10:20:12.209Z | 63.267° ENE |
| 8 mins | 2026-05-02 11:55:12.209Z | 325.54° NNW | 2026-05-02 11:59:12.209Z | 124.834° SE | 44.43° | 2026-05-02 12:03:12.209Z | 143.983° SSE |
| 5 mins | 2026-05-03 02:03:12.209Z | 143.273° SSE | 2026-05-03 02:05:12.209Z | 113.295° SE | 19.536° | 2026-05-03 02:08:12.209Z | 72.424° E |
| 8 mins | 2026-05-03 03:41:12.209Z | 235.267° WSW | 2026-05-03 03:45:12.209Z | 324.332° NNW | 39.433° | 2026-05-03 03:49:12.209Z | 25.836° NE |
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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