COSMOS 2251 DEB, 35959
Orbit data source: Space-Track
COSMOS 2251 DEB, 35959 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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35959 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
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 COSMOS 2251 DEB
1 35959U 93036AUZ 26247.50533583 .00000117 00000-0 50746-4 0 9990
2 35959 74.0331 185.4737 0022952 207.4500 152.5441 14.34284373887389Epoch: 2026-09-04T12:07Z
TLE epoch observation values (Epoch: 2026-09-04T12:07:41.015Z)
Latitude
-0.00007°
Longitude
19.92459°
Altitude
794.638 km
Speed
7.449 km/s
True Right ascension
12h 21m 53s
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
06:40:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
791.49 km
Perigee altitude
758.654 km
Semi-major axis
7,153.209 km
Eccentricity
0.0023
Inclination
74.0331°
RAAN
185.4737°
Arg. of periapsis
207.45°
True anomaly
152.66506°
Mean anomaly
152.5441°
Eccentric anomaly
152.60461°
Mean motion
3.5875 °/min
Orbital period
100.35 mins
BSTAR
0.000050746
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-09-05 20:03:10.783Z | 148.491° SSE | 2026-09-05 20:07:10.783Z | 94.662° ESE | 22.928° | 2026-09-05 20:11:10.783Z | 45.393° ENE |
| 8 mins | 2026-09-05 21:45:10.783Z | 232.716° WSW | 2026-09-05 21:49:10.783Z | 300.329° NW | 32.096° | 2026-09-05 21:53:10.783Z | 359.892° N |
| 8 mins | 2026-09-06 06:33:10.783Z | 2.947° NNE | 2026-09-06 06:36:10.783Z | 53.701° ENE | 33.808° | 2026-09-06 06:41:10.783Z | 135.816° SSE |
| 6 mins | 2026-09-06 08:16:10.783Z | 296.258° NW | 2026-09-06 08:18:10.783Z | 267.581° W | 20.214° | 2026-09-06 08:22:10.783Z | 215.365° SW |
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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