COSMOS 249 DEB, 3911
Orbit data source: Space-Track
COSMOS 249 DEB, 3911 is space debris in LEO originally from a launch on Sun, 20 Oct 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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3911 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: 2 days ago
TLE from 2 days ago
0 COSMOS 249 DEB
1 03911U 68091BP 26172.74330882 .00003645 00000-0 92516-3 0 9995
2 03911 62.9191 85.7409 0792457 82.8455 286.1899 13.42873108667934Epoch: 2026-06-21T17:50Z
TLE epoch observation values (Epoch: 2026-06-21T17:50:21.882Z)
Latitude
-0.00005°
Longitude
-91.7895°
Altitude
979.712 km
Speed
7.421 km/s
True Right ascension
05h 42m 57s
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
14:46:47
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,689.886 km
Perigee altitude
505.066 km
Semi-major axis
7,475.613 km
Eccentricity
0.07925
Inclination
62.9191°
RAAN
85.7409°
Arg. of periapsis
82.8455°
True anomaly
277.25815°
Mean anomaly
286.1899°
Eccentric anomaly
281.74451°
Mean motion
3.35794 °/min
Orbital period
107.21 mins
BSTAR
0.00092516
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Other satellites on launch #91 in the year 1968 (1968-10-20 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 249 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 | 2026-06-24 05:23:01.075Z | 289.902° WNW | 2026-06-24 05:26:01.075Z | 236.687° WSW | 25.387° | 2026-06-24 05:30:01.075Z | 186.848° SSW |
| 7 mins | 2026-06-24 19:15:01.075Z | 196.31° SSW | 2026-06-24 19:19:01.075Z | 106.611° ESE | 39.188° | 2026-06-24 19:22:01.075Z | 46.542° ENE |
| 4 mins | 2026-06-25 02:47:01.075Z | 24.043° NE | 2026-06-25 02:48:01.075Z | 41.643° NE | 17.396° | 2026-06-25 02:51:01.075Z | 84.718° E |
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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