COSMOS 2251 DEB, 35840
Orbit data source: Space-Track
COSMOS 2251 DEB, 35840 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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35840 intel report (Beta)
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Edit Public Description
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: 1 week ago
TLE from 1 week ago
0 COSMOS 2251 DEB
1 35840U 93036ATN 26027.37668029 .00008345 00000-0 25307-2 0 9998
2 35840 73.9310 73.5565 0118375 324.7528 34.5836 14.38353389859471Epoch: 2026-01-27T09:02Z
TLE epoch observation values (Epoch: 2026-01-27T09:02:25.177Z)
Latitude
0.00002°
Longitude
171.29264°
Altitude
697.263 km
Speed
7.544 km/s
True Right ascension
04h 54m 13s
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
04:15:16
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
846.09 km
Perigee altitude
677.058 km
Semi-major axis
7,139.711 km
Eccentricity
0.01184
Inclination
73.931°
RAAN
73.5565°
Arg. of periapsis
324.7528°
True anomaly
35.36301°
Mean anomaly
34.5836°
Eccentric anomaly
34.97235°
Mean motion
3.59768 °/min
Orbital period
100.06 mins
BSTAR
0.0025307
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-02-03 03:03:36.644Z | 198.652° SSW | 2026-02-03 03:08:36.644Z | 339.603° N | 44.927° | 2026-02-03 03:13:36.644Z | 18.527° NNE |
| 7 mins | 2026-02-03 11:51:36.644Z | 19.029° NNE | 2026-02-03 11:54:36.644Z | 58.006° ENE | 20.589° | 2026-02-03 11:58:36.644Z | 105.949° ESE |
| 9 mins | 2026-02-03 13:32:36.644Z | 328.168° NNW | 2026-02-03 13:36:36.644Z | 270.373° WNW | 38.606° | 2026-02-03 13:41:36.644Z | 182.765° SSW |
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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