COSMOS 2251 DEB, 40239

Orbit data source: Space-Track

COSMOS 2251 DEB, 40239 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

40239, 1993-036BVU

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)

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Last TLE update: 3 days ago

TLE from 3 days ago

0 COSMOS 2251 DEB
1 40239U 93036BVU 26170.56309398  .00000762  00000-0  14832-3 0  9994
2 40239  74.0300 273.9799 0085835 338.2095  39.0435 14.62654590623714

Epoch: 2026-06-19T13:30Z

TLE epoch observation values (Epoch: 2026-06-19T13:30:51.319Z)

Latitude

17.15989°

Longitude

168.51792°

Altitude

639.761 km

Speed

7.565 km/s

True Right ascension

18h 36m 05s

True Declination

17° 03' 42"

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

23:18:58

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

742.813 km

Perigee altitude

621.608 km

Semi-major axis

7,060.347 km

Eccentricity

0.00858

Inclination

74.03°

RAAN

273.9799°

Arg. of periapsis

338.2095°

True anomaly

39.66827°

Mean anomaly

39.0435°

Eccentric anomaly

39.35536°

Mean motion

3.65851 °/min

Orbital period

98.4 mins

BSTAR

0.00014832

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

COSMOS 2251 DEB, 36384 (Decayed)

COSMOS 2251 DEB, 35959

COSMOS 2251 DEB, 34450 (Decayed)

COSMOS 2251 DEB, 34817 (Decayed)

COSMOS 2251 DEB, 34947 (Decayed)

COSMOS 2251 DEB, 35672 (Decayed)

COSMOS 2251 DEB, 35703

COSMOS 2251 DEB, 33918 (Decayed)

COSMOS 2251 DEB, 47060 (Decayed)

COSMOS 2251 DEB, 36469 (Decayed)

COSMOS 2251 DEB, 38482 (Decayed)

COSMOS 2251 DEB, 35041 (Decayed)

COSMOS 2251 DEB, 35997

COSMOS 2251 DEB, 37335 (Decayed)

COSMOS 2251 DEB, 40802

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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.
9 mins	2026-06-22 17:29:39.817Z	349.745° N	2026-06-22 17:33:39.817Z	42.486° NE	40.087°	2026-06-22 17:38:39.817Z	147.813° SSE
7 mins	2026-06-23 07:51:39.817Z	216.709° SW	2026-06-23 07:54:39.817Z	290.032° WNW	40.677°	2026-06-23 07:58:39.817Z	9.558° NNE

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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, 40239 on other resources

View COSMOS 2251 DEB, 40239 on Heavens-Above

View COSMOS 2251 DEB, 40239 on Keep Track

View COSMOS 2251 DEB, 40239 on Celestrak

View COSMOS 2251 DEB, 40239 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, 40239

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2026-06-19T13:30:51.319Z)

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, 40239 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 days ago