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 (28 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 25351.48436852  .00009279  00000-0  20288-2 0  9990
2 39777  85.9622 172.7412 0060188 170.5587 189.6768 14.56536598602541

Epoch: 2025-12-17T11:37Z

TLE epoch observation values (Epoch: 2025-12-17T11:37:29.440Z)

Latitude

-0.00001°

Longitude

-87.98503°

Altitude

749.494 km

Speed

7.458 km/s

True Right ascension

11h 30m 57s

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

16:03:41

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

743.931 km

Perigee altitude

658.712 km

Semi-major axis

7,079.458 km

Eccentricity

0.00602

Inclination

85.9622°

RAAN

172.7412°

Arg. of periapsis

170.5587°

True anomaly

189.56172°

Mean anomaly

189.6768°

Eccentric anomaly

189.61918°

Mean motion

3.6437 °/min

Orbital period

98.8 mins

BSTAR

0.0020288

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

IRIDIUM 33 DEB, 33968 (Decayed)

IRIDIUM 33 DEB, 36027 (Decayed)

IRIDIUM 33 DEB, 33959 (Decayed)

IRIDIUM 33 DEB, 34078 (Decayed)

IRIDIUM 33 DEB, 36393 (Decayed)

IRIDIUM 33 DEB, 46972

IRIDIUM 33 DEB, 35750 (Decayed)

IRIDIUM 33 DEB, 35914 (Decayed)

IRIDIUM 33 DEB, 36010 (Decayed)

IRIDIUM 33 DEB, 34894 (Decayed)

IRIDIUM 33 DEB, 33871 (Decayed)

IRIDIUM 33 DEB, 35799 (Decayed)

IRIDIUM 33 DEB, 33951 (Decayed)

IRIDIUM 33 DEB, 38235 (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	2025-12-19 23:33:57.591Z	24.076° NE	2025-12-19 23:36:57.591Z	77.049° E	28.176°	2025-12-19 23:40:57.591Z	143.463° SSE
5 mins	2025-12-20 01:13:57.591Z	312.407° NW	2025-12-20 01:15:57.591Z	280° WNW	19.76°	2025-12-20 01:18:57.591Z	234° WSW
8 mins	2025-12-20 12:17:57.591Z	160.971° S	2025-12-20 12:20:57.591Z	108.127° ESE	39.03°	2025-12-20 12:25:57.591Z	12.528° 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 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: 2025-12-17T11:37:29.440Z)

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