COSMOS 2251 DEB, 35439
Orbit data source: Space-Track
COSMOS 2251 DEB, 35439 is space debris in LEO originally from a launch on Wed, 16 Jun 1993 UTC launched from the Plesetsk Missile And Space Complex (PKMTR). The debris from Iridium 33, an American commercial communications satellite, has been tracked extensively since its accidental collision with the defunct Russian satellite Cosmos 2251 in 2009. This event, occurring at high speed in low Earth orbit (LEO), generated thousands of pieces of space debris, significantly increasing the risk of further collisions. The Iridium 33 debris cloud has impacted space traffic management and orbital debris mitigation strategies, making it a subject of ongoing study in space situational awareness.
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35439 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: 20 hours ago
TLE from 20 hours ago
0 COSMOS 2251 DEB
1 35439U 93036AKH 26264.96318753 .00001082 00000-0 66105-3 0 9999
2 35439 74.0206 8.9041 0237515 114.4715 248.1388 13.93972544879064Epoch: 2026-09-21T23:06Z
TLE epoch observation values (Epoch: 2026-09-21T23:06:59.402Z)
Latitude
0°
Longitude
21.32111°
Altitude
985.311 km
Speed
7.325 km/s
True Right ascension
00h 35m 36s
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
12:23:49
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,085.574 km
Perigee altitude
739.251 km
Semi-major axis
7,290.549 km
Eccentricity
0.02375
Inclination
74.0206°
RAAN
8.9041°
Arg. of periapsis
114.4715°
True anomaly
245.64122°
Mean anomaly
248.1388°
Eccentric anomaly
246.88717°
Mean motion
3.48661 °/min
Orbital period
103.25 mins
BSTAR
0.00066105
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Other satellites on launch #36 in the year 1993 (1993-06-16 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 2251 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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-09-23 07:56:38.768Z | 189.982° SSW | 2026-09-23 08:02:38.768Z | 73.266° E | 70.962° | 2026-09-23 08:07:38.768Z | 22.949° NE |
| 4 mins | 2026-09-23 09:46:38.768Z | 286.818° WNW | 2026-09-23 09:47:38.768Z | 298.908° NW | 15.516° | 2026-09-23 09:50:38.768Z | 334.501° NNW |
| 6 mins | 2026-09-23 17:01:38.768Z | 23.505° NE | 2026-09-23 17:04:38.768Z | 67.429° ENE | 20.124° | 2026-09-23 17:07:38.768Z | 104.628° ESE |
| 7 mins | 2026-09-23 18:46:38.768Z | 317.926° NNW | 2026-09-23 18:49:38.768Z | 253.847° W | 45.49° | 2026-09-23 18:53:38.768Z | 188.638° SSW |
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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