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: 16 hours ago

TLE from 16 hours ago

0 IRIDIUM 33 DEB
1 39777U 97051AAJ 26077.56476860  .00007362  00000-0  15223-2 0  9992
2 39777  85.9609 128.4490 0057996 219.1706 140.5300 14.59152816615818

Epoch: 2026-03-18T13:33Z

TLE epoch observation values (Epoch: 2026-03-18T13:33:16.007Z)

Latitude

0.00006°

Longitude

109.00559°

Altitude

730.764 km

Speed

7.473 km/s

True Right ascension

08h 33m 47s

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

10:32:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

733.858 km

Perigee altitude

651.841 km

Semi-major axis

7,070.986 km

Eccentricity

0.0058

Inclination

85.9609°

RAAN

128.449°

Arg. of periapsis

219.1706°

True anomaly

140.9501°

Mean anomaly

140.53°

Eccentric anomaly

140.74029°

Mean motion

3.65025 °/min

Orbital period

98.62 mins

BSTAR

0.0015223

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

IRIDIUM 33 DEB, 35927 (Decayed)

IRIDIUM 33 DEB, 33772 (Decayed)

IRIDIUM 33 DEB, 34502 (Decayed)

IRIDIUM 33 DEB, 34362 (Decayed)

IRIDIUM 33 DEB, 34698 (Decayed)

IRIDIUM 33 DEB, 34658 (Decayed)

IRIDIUM 33 DEB, 34829 (Decayed)

IRIDIUM 33 DEB, 36013 (Decayed)

IRIDIUM 33 DEB, 35924 (Decayed)

IRIDIUM 33 DEB, 34827 (Decayed)

IRIDIUM 33 DEB, 39593 (Decayed)

IRIDIUM 33 DEB, 34890 (Decayed)

IRIDIUM 33 DEB, 34152 (Decayed)

IRIDIUM 33 DEB, 35294 (Decayed)

IRIDIUM 33 DEB, 35738 (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	2026-03-19 14:49:29.718Z	19.711° NNE	2026-03-19 14:52:29.718Z	67.16° ENE	29.997°	2026-03-19 14:56:29.718Z	143.751° SSE
5 mins	2026-03-19 16:29:29.718Z	312.8° NW	2026-03-19 16:31:29.718Z	282.569° WNW	18.917°	2026-03-19 16:34:29.718Z	237.598° WSW
7 mins	2026-03-20 03:32:29.718Z	161.532° S	2026-03-20 03:35:29.718Z	94.912° ESE	40.546°	2026-03-20 03:39:29.718Z	13.705° NNE
4 mins	2026-03-20 05:13:29.718Z	265.526° W	2026-03-20 05:15:29.718Z	291.978° WNW	13.945°	2026-03-20 05:17:29.718Z	316.396° NNW

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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: 16 hours ago

TLE from 16 hours ago

TLE epoch observation values (Epoch: 2026-03-18T13:33:16.007Z)

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: 16 hours ago