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.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
3911 intel report (Beta)
Focus sentinelFocus sentinel
Edit Public Description
Focus sentinelFocus sentinel
Edit Sat Name
Focus sentinelFocus sentinel
Create New Watchlist
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: 12 hours ago
TLE from 12 hours ago
0 COSMOS 249 DEB
1 03911U 68091BP 26219.87259119 .00001174 00000-0 31979-3 0 9995
2 03911 62.9207 321.6099 0791152 87.3714 281.7528 13.43248617674264Epoch: 2026-08-07T20:56Z
TLE epoch observation values (Epoch: 2026-08-07T20:56:31.878Z)
Latitude
-0.00004°
Longitude
51.085°
Altitude
1,024.231 km
Speed
7.377 km/s
True Right ascension
21h 26m 26s
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
23:23:09
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,687.406 km
Perigee altitude
504.758 km
Semi-major axis
7,474.219 km
Eccentricity
0.07912
Inclination
62.9207°
RAAN
321.6099°
Arg. of periapsis
87.3714°
True anomaly
272.73211°
Mean anomaly
281.7528°
Eccentric anomaly
277.25614°
Mean motion
3.35888 °/min
Orbital period
107.18 mins
BSTAR
0.00031979
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #91 in the year 1968 (1968-10-20 UTC)
Did you know?
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
Loading observer location...
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 | 2026-08-08 09:37:02.502Z | 245.448° WSW | 2026-08-08 09:41:02.502Z | 310.68° NW | 29.126° | 2026-08-08 09:44:02.502Z | 11.354° NNE |
| 7 mins | 2026-08-08 17:08:02.502Z | 338.898° N | 2026-08-08 17:10:02.502Z | 20.774° NNE | 40.465° | 2026-08-08 17:15:02.502Z | 134.824° SE |
| 7 mins | 2026-08-09 08:50:02.502Z | 223.955° SW | 2026-08-09 08:54:02.502Z | 343.998° N | 41.817° | 2026-08-09 08:57:02.502Z | 28.098° NE |
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 |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
|---|