IRIDIUM 33 DEB, 39781

Orbit data source: Space-Track

IRIDIUM 33 DEB, 39781 is space debris in LEO originally from a launch on Sun, 14 Sep 1997 UTC launched from the Tyuratam Missile And Space Complex (TTMTR). 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

39781, 1997-051AAN

Orbit

LEO

Country

Related business

Iridium Communications Inc. (US)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1997-09-14 (29 years ago)

Launch vehicle

Unknown

Launch site

Tyuratam Missile And Space Complex (TTMTR)

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: 4 days ago

TLE from 4 days ago

0 IRIDIUM 33 DEB
1 39781U 97051AAN 26185.22003520  .00010998  00000-0  40228-2 0  9991
2 39781  86.3788 173.9014 0165466 343.3313  30.0613 14.25510702110016

Epoch: 2026-07-04T05:16Z

TLE epoch observation values (Epoch: 2026-07-04T05:16:51.041Z)

Latitude

14.29995°

Longitude

173.37119°

Altitude

706.677 km

Speed

7.557 km/s

True Right ascension

11h 39m 16s

True Declination

14° 13' 02"

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

09:48:21

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

922.588 km

Perigee altitude

684.916 km

Semi-major axis

7,181.889 km

Eccentricity

0.01655

Inclination

86.3788°

RAAN

173.9014°

Arg. of periapsis

343.3313°

True anomaly

31.02836°

Mean anomaly

30.0613°

Eccentric anomaly

30.54309°

Mean motion

3.56603 °/min

Orbital period

100.95 mins

BSTAR

0.0040228

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Other satellites on launch #51 in the year 1997 (1997-09-14 UTC)

IRIDIUM 33 DEB, 35859 (Decayed)

IRIDIUM 33 DEB, 35802 (Decayed)

IRIDIUM 33 DEB, 36643 (Decayed)

IRIDIUM 33 DEB, 39791 (Decayed)

IRIDIUM 33 DEB, 34531 (Decayed)

IRIDIUM 33 DEB, 34702 (Decayed)

IRIDIUM 33 DEB, 33851 (Decayed)

IRIDIUM 33 DEB, 34601 (Decayed)

IRIDIUM 33 DEB, 39792 (Decayed)

IRIDIUM 33 DEB, 39795 (Decayed)

IRIDIUM 33 DEB, 38021 (Decayed)

IRIDIUM 33 DEB, 35911 (Decayed)

IRIDIUM 33 DEB, 34649 (Decayed)

IRIDIUM 33 DEB, 34709 (Decayed)

IRIDIUM 33 DEB, 36016 (Decayed)

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IRIDIUM 33 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	2026-07-07 22:37:20.999Z	133.428° SE	2026-07-07 22:41:20.999Z	77.068° E	22.786°	2026-07-07 22:44:20.999Z	35.192° NE
7 mins	2026-07-08 00:19:20.999Z	227.474° WSW	2026-07-08 00:22:20.999Z	282.589° WNW	28.82°	2026-07-08 00:26:20.999Z	340.586° N
10 mins	2026-07-08 10:52:20.999Z	5.206° NNE	2026-07-08 10:57:20.999Z	117.775° SE	42.347°	2026-07-08 11:02:20.999Z	168.901° S
5 mins	2026-07-08 12:35:20.999Z	307.068° NW	2026-07-08 12:37:20.999Z	284.484° WNW	15.91°	2026-07-08 12:40:20.999Z	251.592° W

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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 IRIDIUM 33 DEB, 39781 on other resources

View IRIDIUM 33 DEB, 39781 on Heavens-Above

View IRIDIUM 33 DEB, 39781 on Keep Track

View IRIDIUM 33 DEB, 39781 on Celestrak

View IRIDIUM 33 DEB, 39781 on Gunter's Space Page

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

IRIDIUM 33 DEB, 39781

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 4 days ago

TLE from 4 days ago

TLE epoch observation values (Epoch: 2026-07-04T05:16:51.041Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #51 in the year 1997 (1997-09-14 UTC)

IRIDIUM 33 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out IRIDIUM 33 DEB, 39781 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 4 days ago