COSMOS 2251 DEB, 34478

Orbit data source: Space-Track

COSMOS 2251 DEB, 34478 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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Identifier

34478, 1993-036TX

Orbit

LEO

Country

CIS

Related business

Russian Space Forces (RU)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1993-06-16 (33 years ago)

Launch vehicle

Unknown

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 0.1 m

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 COSMOS 2251 DEB
1 34478U 93036TX  26206.52913254  .00279949  00000-0  41499-2 0  9993
2 34478  74.0272 251.6441 0014845 339.4611  20.6005 15.54071679924016

Epoch: 2026-07-25T12:41Z

TLE epoch observation values (Epoch: 2026-07-25T12:41:57.051Z)

Latitude

-0.00005°

Longitude

117.91627°

Altitude

398.179 km

Speed

7.677 km/s

True Right ascension

16h 46m 34s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

14:09:53

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

412.414 km

Perigee altitude

392.283 km

Semi-major axis

6,780.485 km

Eccentricity

0.00148

Inclination

74.0272°

RAAN

251.6441°

Arg. of periapsis

339.4611°

True anomaly

20.66046°

Mean anomaly

20.6005°

Eccentric anomaly

20.63047°

Mean motion

3.88734 °/min

Orbital period

92.61 mins

BSTAR

0.0041499

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Other satellites on launch #36 in the year 1993 (1993-06-16 UTC)

COSMOS 2251 DEB, 35450 (Decayed)

COSMOS 2251 DEB, 35597 (Decayed)

COSMOS 2251 DEB, 34288 (Decayed)

COSMOS 2251 DEB, 35699 (Decayed)

COSMOS 2251 DEB, 33797

COSMOS 2251 DEB, 34472

COSMOS 2251 DEB, 34562 (Decayed)

COSMOS 2251 DEB, 33894

COSMOS 2251 DEB, 33839

COSMOS 2251 DEB, 34610

COSMOS 2251 DEB, 34274

COSMOS 2251 DEB, 34961 (Decayed)

COSMOS 2251 DEB, 35788 (Decayed)

COSMOS 2251 DEB, 35781 (Decayed)

COSMOS 2251 DEB, 47065 (Decayed)

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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.
5 mins	2026-07-26 04:17:23.380Z	195.893° SSW	2026-07-26 04:19:23.380Z	175.336° S	44.406°	2026-07-26 04:22:23.380Z	19.954° NNE
4 mins	2026-07-26 13:58:23.380Z	13.428° NNE	2026-07-26 14:00:23.380Z	86.209° E	29.792°	2026-07-26 14:02:23.380Z	131.914° SE

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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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Check out COSMOS 2251 DEB, 34478 on other resources

View COSMOS 2251 DEB, 34478 on Heavens-Above

View COSMOS 2251 DEB, 34478 on Keep Track

View COSMOS 2251 DEB, 34478 on Celestrak

View COSMOS 2251 DEB, 34478 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

COSMOS 2251 DEB, 34478

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-07-25T12:41:57.051Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #36 in the year 1993 (1993-06-16 UTC)

COSMOS 2251 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 2251 DEB, 34478 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 12 hours ago