COSMOS 249 DEB *, 3908
Orbit data source: Space-Track
COSMOS 249 DEB *, 3908 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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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: 9 hours ago
TLE from 9 hours ago
0 COSMOS 249 DEB *
1 3908U 68091BL 26220.05160309 .00000646 00000-0 50027-3 0 9993
2 3908 63.3377 197.6477 0601000 33.6013 26.3931 13.36581336788427Epoch: 2026-08-08T01:14Z
TLE epoch observation values (Epoch: 2026-08-08T01:14:18.506Z)
Latitude
53.08646°
Longitude
-95.8298°
Altitude
731.592 km
Speed
7.691 km/s
True Right ascension
15h 57m 15s
True Declination
52° 55' 14"
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
00:41:08
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,571.568 km
Perigee altitude
670.186 km
Semi-major axis
7,499.014 km
Eccentricity
0.0601
Inclination
63.3377°
RAAN
197.6477°
Arg. of periapsis
33.6013°
True anomaly
29.67292°
Mean anomaly
26.3931°
Eccentric anomaly
28.01026°
Mean motion
3.34223 °/min
Orbital period
107.71 mins
BSTAR
0.00050027
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-08-08 10:33:48.409Z | 267.566° W | 2026-08-08 10:35:48.409Z | 239.2° WSW | 28.236° | 2026-08-08 10:41:48.409Z | 189.449° SSW |
| 8 mins | 2026-08-09 00:26:48.409Z | 212.865° SW | 2026-08-09 00:29:48.409Z | 213.678° SW | 43.824° | 2026-08-09 00:34:48.409Z | 34.088° NE |
| 4 mins | 2026-08-09 02:20:48.409Z | 307.968° NW | 2026-08-09 02:21:48.409Z | 321.484° NNW | 13.809° | 2026-08-09 02:24:48.409Z | 358.769° N |
| 11 mins | 2026-08-09 07:59:48.409Z | 350.742° N | 2026-08-09 08:03:48.409Z | 48.566° ENE | 32.953° | 2026-08-09 08:10:48.409Z | 115.644° SE |
| 13 mins | 2026-08-09 09:49:48.409Z | 309.753° NW | 2026-08-09 09:54:48.409Z | 251.644° W | 36.2° | 2026-08-09 10:02:48.409Z | 173.242° S |
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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