IRIDIUM 33 DEB, 39777

Orbit data source: Space-Track

IRIDIUM 33 DEB, 39777 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

39777, 1997-051AAJ

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: 2 days ago

TLE from 2 days ago

0 IRIDIUM 33 DEB
1 39777U 97051AAJ 26187.12347330  .00007082  00000-0  13938-2 0  9995
2 39777  85.9567  74.8792 0053676 208.9011 150.9225 14.61536714631800

Epoch: 2026-07-06T02:57Z

TLE epoch observation values (Epoch: 2026-07-06T02:57:48.093Z)

Latitude

0.00001°

Longitude

106.31584°

Altitude

724.503 km

Speed

7.475 km/s

True Right ascension

04h 59m 31s

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

08:25:02

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

723.065 km

Perigee altitude

647.239 km

Semi-major axis

7,063.289 km

Eccentricity

0.00537

Inclination

85.9567°

RAAN

74.8792°

Arg. of periapsis

208.9011°

True anomaly

151.21968°

Mean anomaly

150.9225°

Eccentric anomaly

151.07126°

Mean motion

3.65622 °/min

Orbital period

98.46 mins

BSTAR

0.0013938

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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, 33887

IRIDIUM 33 DEB, 35802 (Decayed)

IRIDIUM 33 DEB, 36643 (Decayed)

IRIDIUM 33 DEB, 33864 (Decayed)

IRIDIUM 33 DEB, 39791 (Decayed)

IRIDIUM 33, 24946

IRIDIUM 33 DEB, 34702 (Decayed)

IRIDIUM 33 DEB, 39781

IRIDIUM 33 DEB, 33851 (Decayed)

IRIDIUM 33 DEB, 46962 (Decayed)

IRIDIUM 33 DEB, 37565

IRIDIUM 33 DEB, 37550

IRIDIUM 33 DEB, 34601 (Decayed)

IRIDIUM 33 DEB, 38033 (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	2026-07-08 04:51:15.475Z	342.875° N	2026-07-08 04:54:15.475Z	254.306° W	40.544°	2026-07-08 04:58:15.475Z	191.99° SSW
5 mins	2026-07-08 15:55:15.475Z	106.386° ESE	2026-07-08 15:57:15.475Z	74.766° E	18.59°	2026-07-08 16:00:15.475Z	36.744° NE
7 mins	2026-07-08 17:32:15.475Z	216.493° SW	2026-07-08 17:35:15.475Z	273.114° WNW	33.007°	2026-07-08 17:39:15.475Z	343.98° N

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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, 39777 on other resources

View IRIDIUM 33 DEB, 39777 on Heavens-Above

View IRIDIUM 33 DEB, 39777 on Keep Track

View IRIDIUM 33 DEB, 39777 on Celestrak

View IRIDIUM 33 DEB, 39777 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, 39777

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-07-06T02:57:48.093Z)

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, 39777 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago