COSMOS 2251 DEB, 36439

Orbit data source: Space-Track

COSMOS 2251 DEB, 36439 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

36439, 1993-036BAN

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: 6 days ago

TLE from 6 days ago

0 COSMOS 2251 DEB
1 36439U 93036BAN 26093.59931833  .00003050  00000-0  28368-2 0  9994
2 36439  73.9698 218.1182 0426329 168.6392 192.4724 13.48215193601208

Epoch: 2026-04-03T14:23Z

TLE epoch observation values (Epoch: 2026-04-03T14:23:01.103Z)

Latitude

-0.00004°

Longitude

170.43246°

Altitude

1,392.394 km

Speed

7.013 km/s

True Right ascension

14h 32m 28s

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

13:00:20

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,394.369 km

Perigee altitude

758.739 km

Semi-major axis

7,454.691 km

Eccentricity

0.04263

Inclination

73.9698°

RAAN

218.1182°

Arg. of periapsis

168.6392°

True anomaly

191.46964°

Mean anomaly

192.4724°

Eccentric anomaly

191.96596°

Mean motion

3.37209 °/min

Orbital period

106.76 mins

BSTAR

0.0028368

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

COSMOS 2251 DEB, 37975

COSMOS 2251 DEB, 34332 (Decayed)

COSMOS 2251 DEB, 34917 (Decayed)

COSMOS 2251 DEB, 34920 (Decayed)

COSMOS 2251 DEB, 35444 (Decayed)

COSMOS 2251 DEB, 34281 (Decayed)

COSMOS 2251 DEB, 33827 (Decayed)

COSMOS 2251 DEB, 36434 (Decayed)

COSMOS 2251 DEB, 35279 (Decayed)

COSMOS 2251 DEB, 34860 (Decayed)

COSMOS 2251 DEB, 33898 (Decayed)

COSMOS 2251 DEB, 34591 (Decayed)

COSMOS 2251 DEB, 38211 (Decayed)

COSMOS 2251 DEB, 37112 (Decayed)

COSMOS 2251 DEB, 34674 (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.
13 mins	2026-04-09 07:35:40.049Z	163.074° S	2026-04-09 07:42:40.049Z	100.373° ESE	31.217°	2026-04-09 07:48:40.049Z	37.981° NE
12 mins	2026-04-09 09:25:40.049Z	230.134° WSW	2026-04-09 09:31:40.049Z	298.979° NW	34.538°	2026-04-09 09:37:40.049Z	4.611° NNE
8 mins	2026-04-09 18:48:40.049Z	337.285° NNW	2026-04-09 18:52:40.049Z	220.877° SW	44.28°	2026-04-09 18:56:40.049Z	167.855° S

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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, 36439 on other resources

View COSMOS 2251 DEB, 36439 on Heavens-Above

View COSMOS 2251 DEB, 36439 on Keep Track

View COSMOS 2251 DEB, 36439 on Celestrak

View COSMOS 2251 DEB, 36439 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, 36439

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 6 days ago

TLE from 6 days ago

TLE epoch observation values (Epoch: 2026-04-03T14:23:01.103Z)

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, 36439 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 6 days ago