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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ISO8601 Format

Identifier

39777, 1997-051AAJ

Orbit

LEO

Last TLE update

1 day ago

Origin

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

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history

TLE from 1 day ago

0 IRIDIUM 33 DEB
1 39777U 97051AAJ 25216.05141562  .00004246  00000-0  98944-3 0  9998
2 39777  85.9600 238.2878 0059075 266.4921  92.9527 14.53543547582850

Epoch: 2025-08-04T01:14Z

TLE epoch observation values (Epoch: 2025-08-04T01:14:02.309Z)

Latitude

-0.00003°

Longitude

-93.08625°

Altitude

719.576 km

Speed

7.494 km/s

True Right ascension

15h 53m 09s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

14.60488°

Longitude

85.18389°

Altitude

720.872 km

Speed

7.494 km/s

Apparent Right ascension

06h 47m 51s

Apparent Declination

-26° 33' 20"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

00:59:04

Azimuth

112.548° SE

Elevation

-14.674°

Doppler factor

Orbital elements

Apogee altitude

752.924 km

Perigee altitude

669.166 km

Semi-major axis

7,089.182 km

Eccentricity

0.00591

Inclination

85.96°

RAAN

238.2878°

Arg. of periapsis

266.4921°

True anomaly

93.62848°

Mean anomaly

92.9527°

Eccentric anomaly

93.29062°

Mean motion

3.63621 °/min

Orbital period

99 mins

BSTAR

0.00098944

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

IRIDIUM 29, 24944

IRIDIUM 33 DEB, 33857 (Decayed)

IRIDIUM 33 DEB, 38473 (Decayed)

IRIDIUM 33 DEB, 38474

IRIDIUM 33 DEB, 38475 (Decayed)

IRIDIUM 33 DEB, 38476 (Decayed)

IRIDIUM 33 DEB, 38477

IRIDIUM 33 DEB, 39593 (Decayed)

IRIDIUM 33 DEB, 39594

IRIDIUM 33 DEB, 39595 (Decayed)

IRIDIUM 33 DEB, 39778

IRIDIUM 33 DEB, 39779

IRIDIUM 33 DEB, 39780 (Decayed)

IRIDIUM 33 DEB, 39781

IRIDIUM 33 DEB Visibility forecast

Observer location: undefined°, undefined°

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	2025-08-05 12:30:31.687Z	29.263° NE	2025-08-05 12:34:31.687Z	82.754° E	19.17°	2025-08-05 12:37:31.687Z	122.024° SE
7 mins	2025-08-05 14:10:31.687Z	333.823° NNW	2025-08-05 14:13:31.687Z	280.623° WNW	32.798°	2025-08-05 14:17:31.687Z	209.028° SW
6 mins	2025-08-06 01:17:31.687Z	131.187° SE	2025-08-06 01:19:31.687Z	95.424° ESE	28.011°	2025-08-06 01:23:31.687Z	28.39° NE
7 mins	2025-08-06 02:56:31.687Z	236.541° WSW	2025-08-06 02:59:31.687Z	284.178° WNW	23.38°	2025-08-06 03:03:31.687Z	337.193° NNW

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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Authenticating...

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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

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