COSMOS 2251 DEB, 39546

Orbit data source: Space-Track

COSMOS 2251 DEB, 39546 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

39546, 1993-036BUC

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 39546U 93036BUC 26167.62227041  .00008841  00000-0  75384-3 0  9995
2 39546  73.9968 121.0867 0041882 233.4668 126.2659 14.97169931672142

Epoch: 2026-06-16T14:56Z

TLE epoch observation values (Epoch: 2026-06-16T14:56:04.163Z)

Latitude

0.00004°

Longitude

-7.82229°

Altitude

595.638 km

Speed

7.553 km/s

True Right ascension

08h 04m 20s

True Declination

0° 00' 00"

Sunlit

Object was in daylight 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

04:49:04

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

602.319 km

Perigee altitude

544.092 km

Semi-major axis

6,951.343 km

Eccentricity

0.00419

Inclination

73.9968°

RAAN

121.0867°

Arg. of periapsis

233.4668°

True anomaly

126.65166°

Mean anomaly

126.2659°

Eccentric anomaly

126.4589°

Mean motion

3.7449 °/min

Orbital period

96.13 mins

BSTAR

0.00075384

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

COSMOS 2251 DEB, 37538 (Decayed)

COSMOS 2251 DEB, 34848 (Decayed)

COSMOS 2251 DEB, 35973 (Decayed)

COSMOS 2251 DEB, 34047 (Decayed)

COSMOS 2251 DEB, 38069 (Decayed)

COSMOS 2251 DEB, 36631 (Decayed)

COSMOS 2251 DEB, 37334 (Decayed)

COSMOS 2251 DEB, 34718 (Decayed)

COSMOS 2251 DEB, 34440 (Decayed)

COSMOS 2251 DEB, 35787

COSMOS 2251 DEB, 35956

COSMOS 2251 DEB, 35600 (Decayed)

COSMOS 2251 DEB, 33813 (Decayed)

COSMOS 2251 DEB, 34862 (Decayed)

COSMOS 2251 DEB, 34628 (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	2026-06-19 21:38:39.020Z	198.696° SSW	2026-06-19 21:41:39.020Z	204.305° SW	43.234°	2026-06-19 21:45:39.020Z	18.181° NNE
6 mins	2026-06-20 07:42:39.020Z	341.264° N	2026-06-20 07:45:39.020Z	162.19° S	43.95°	2026-06-20 07:48:39.020Z	162.301° 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, 39546 on other resources

View COSMOS 2251 DEB, 39546 on Heavens-Above

View COSMOS 2251 DEB, 39546 on Keep Track

View COSMOS 2251 DEB, 39546 on Celestrak

View COSMOS 2251 DEB, 39546 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, 39546

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: 2026-06-16T14:56:04.163Z)

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, 39546 on other resources

Documentation

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