COSMOS 2251 DEB, 35661

Orbit data source: Space-Track

COSMOS 2251 DEB, 35661 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

35661, 1993-036APC

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 (32 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: 21 hours ago

TLE from 21 hours ago

0 COSMOS 2251 DEB
1 35661U 93036APC 25343.71430711  .00014219  00000-0  14984-2 0  9998
2 35661  74.0134  85.7599 0088327 190.7537 169.1759 14.86479367878236

Epoch: 2025-12-09T17:08Z

TLE epoch observation values (Epoch: 2025-12-09T17:08:36.134Z)

Latitude

0.00006°

Longitude

109.91434°

Altitude

672.263 km

Speed

7.488 km/s

True Right ascension

05h 43m 02s

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

12:20:13

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

668.21 km

Perigee altitude

544.823 km

Semi-major axis

6,984.653 km

Eccentricity

0.00883

Inclination

74.0134°

RAAN

85.7599°

Arg. of periapsis

190.7537°

True anomaly

169.36394°

Mean anomaly

169.1759°

Eccentric anomaly

169.27012°

Mean motion

3.71814 °/min

Orbital period

96.82 mins

BSTAR

0.0014984

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

COSMOS 2251 DEB, 34746 (Decayed)

COSMOS 2251 DEB, 33902 (Decayed)

COSMOS 2251 DEB, 34336 (Decayed)

COSMOS 2251 DEB, 33941 (Decayed)

COSMOS 2251 DEB, 34961 (Decayed)

COSMOS 2251 DEB, 36381 (Decayed)

COSMOS 2251 DEB, 36370 (Decayed)

COSMOS 2251 DEB, 36386 (Decayed)

COSMOS 2251 DEB, 36448 (Decayed)

COSMOS 2251 DEB, 36461 (Decayed)

COSMOS 2251 DEB, 36383 (Decayed)

COSMOS 2251 DEB, 36421 (Decayed)

COSMOS 2251 DEB, 36426 (Decayed)

COSMOS 2251 DEB, 36435

COSMOS 2251 DEB, 36452 (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.
7 mins	2025-12-10 17:55:28.606Z	352.381° N	2025-12-10 17:59:28.606Z	76.196° E	37.321°	2025-12-10 18:02:28.606Z	140.562° SSE
8 mins	2025-12-11 08:02:28.606Z	198.824° SSW	2025-12-11 08:05:28.606Z	205.411° SW	43.509°	2025-12-11 08:10:28.606Z	18.415° 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, 35661 on other resources

View COSMOS 2251 DEB, 35661 on Heavens-Above

View COSMOS 2251 DEB, 35661 on Keep Track

View COSMOS 2251 DEB, 35661 on Celestrak

View COSMOS 2251 DEB, 35661 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, 35661

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 21 hours ago

TLE from 21 hours ago

TLE epoch observation values (Epoch: 2025-12-09T17:08:36.134Z)

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, 35661 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 21 hours ago