COSMOS 2251 DEB, 34299 (Decayed)
Orbit data source: Space-Track
COSMOS 2251 DEB, 34299 was 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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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
Unknown
Mission
Decayed 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 month ago
TLE from 1 month ago
0 COSMOS 2251 DEB
1 34299U 93036MV 25356.92536510 .05990517 25518-0 85546-2 0 9997
2 34299 73.9583 310.8431 0009820 131.3448 228.8646 16.15901291891725Epoch: 2025-12-22T22:12Z
TLE epoch observation values (Epoch: 2025-12-22T22:12:31.544Z)
Latitude
0.00003°
Longitude
-114.00479°
Altitude
237.798 km
Speed
7.762 km/s
True Right ascension
20h 43m 22s
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
12:41:16
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
234.627 km
Perigee altitude
221.653 km
Semi-major axis
6,606.277 km
Eccentricity
0.00098
Inclination
73.9583°
RAAN
310.8431°
Arg. of periapsis
131.3448°
True anomaly
228.77992°
Mean anomaly
228.8646°
Eccentric anomaly
228.82225°
Mean motion
4.04211 °/min
Orbital period
89.06 mins
BSTAR
0.0085546
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-02-06 12:08:26.121Z | 3.055° NNE | 2026-02-06 12:08:26.121Z | 3.055° NNE | 39.852° | 2026-02-06 12:12:26.121Z | 65.403° ENE |
| 4 mins | 2026-02-06 12:33:26.121Z | 314.5° NW | 2026-02-06 12:37:26.121Z | 51.409° ENE | 39.344° | 2026-02-06 12:37:26.121Z | 51.409° ENE |
| 4 mins | 2026-02-06 13:10:26.121Z | 339.818° N | 2026-02-06 13:14:26.121Z | 75.467° E | 38.799° | 2026-02-06 13:14:26.121Z | 75.467° E |
| 4 mins | 2026-02-06 14:12:26.121Z | 341.911° N | 2026-02-06 14:15:26.121Z | 14.785° NNE | 42.499° | 2026-02-06 14:16:26.121Z | 121.405° SE |
| 5 mins | 2026-02-06 15:13:26.121Z | 347.512° N | 2026-02-06 15:17:26.121Z | 54.214° ENE | 44.465° | 2026-02-06 15:18:26.121Z | 146.013° SSE |
| 5 mins | 2026-02-06 16:38:26.121Z | 166.799° S | 2026-02-06 16:43:26.121Z | 175.701° S | 43.538° | 2026-02-06 16:43:26.121Z | 175.701° S |
| 5 mins | 2026-02-06 17:39:26.121Z | 175.011° S | 2026-02-06 17:43:26.121Z | 290.187° WNW | 43.615° | 2026-02-06 17:44:26.121Z | 188.17° SSW |
| 4 mins | 2026-02-06 18:17:26.121Z | 328.084° NNW | 2026-02-06 18:20:26.121Z | 306.998° NW | 41.288° | 2026-02-06 18:21:26.121Z | 198.752° SSW |
| 4 mins | 2026-02-06 18:41:26.121Z | 303.286° NW | 2026-02-06 18:41:26.121Z | 303.286° NW | 40.599° | 2026-02-06 18:45:26.121Z | 230.938° WSW |
| 4 mins | 2026-02-06 19:30:26.121Z | 329.418° NNW | 2026-02-06 19:33:26.121Z | 309.236° NW | 37.121° | 2026-02-06 19:34:26.121Z | 221.297° SW |
| 4 mins | 2026-02-06 19:54:26.121Z | 269.54° W | 2026-02-06 19:57:26.121Z | 282.247° WNW | 36.733° | 2026-02-06 19:58:26.121Z | 218.341° SW |
| 4 mins | 2026-02-06 21:18:26.121Z | 246.94° WSW | 2026-02-06 21:19:26.121Z | 306.621° NW | 29.132° | 2026-02-06 21:22:26.121Z | 292.45° WNW |
| 5 mins | 2026-02-06 22:06:26.121Z | 258.183° W | 2026-02-06 22:07:26.121Z | 324.275° NNW | 24.687° | 2026-02-06 22:11:26.121Z | 281.021° WNW |
| 4 mins | 2026-02-07 00:43:26.121Z | 54.537° ENE | 2026-02-07 00:47:26.121Z | 38.957° NE | 27.946° | 2026-02-07 00:47:26.121Z | 38.957° NE |
| 5 mins | 2026-02-07 01:42:26.121Z | 0.333° NNE | 2026-02-07 01:43:26.121Z | 76.285° E | 33.529° | 2026-02-07 01:47:26.121Z | 27.863° NE |
| 4 mins | 2026-02-07 03:07:26.121Z | 146.303° SSE | 2026-02-07 03:10:26.121Z | 105.808° ESE | 39.842° | 2026-02-07 03:11:26.121Z | 10.956° NNE |
| 5 mins | 2026-02-07 05:16:26.121Z | 19.069° NNE | 2026-02-07 05:17:26.121Z | 146.235° SSE | 44.622° | 2026-02-07 05:21:26.121Z | 23.455° NE |
| 4 mins | 2026-02-07 05:40:26.121Z | 20.369° NNE | 2026-02-07 05:41:26.121Z | 54.111° ENE | 44.916° | 2026-02-07 05:44:26.121Z | 23.845° NE |
| 4 mins | 2026-02-07 06:39:26.121Z | 23.235° NE | 2026-02-07 06:40:26.121Z | 300.62° NW | 44.718° | 2026-02-07 06:43:26.121Z | 6.544° NNE |
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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