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
Last TLE update
2 days ago
Origin
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 2 days ago
0 IRIDIUM 33 DEB
1 39777U 97051AAJ 25182.45287001  .00006345  00000-0  14885-2 0  9996
2 39777  85.9584 254.5271 0061769  23.5680 336.8334 14.53188890577975
Epoch: 2025-07-01T10:52Z
TLE epoch observation values (Epoch: 2025-07-01T10:52:07.968Z)
Latitude
0.00001°
Longitude
171.74579°
Altitude
678.075 km
Speed
7.539 km/s
True Right ascension
16h 58m 06s
True Declination
0° 00' 00"
Sunlit
Object was in full shadow at epoch
Visualization orbit readout
Latitude
-6.94764°
Longitude
-8.64609°
Altitude
762.465 km
Speed
7.45 km/s
Apparent Right ascension
05h 33m 28s
Apparent Declination
-22° 44' 23"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
18:27:11
Azimuth
37.496° NE
Elevation
-69.401°
Doppler factor
1
Orbital elements
Apogee altitude
755.996 km
Perigee altitude
668.403 km
Semi-major axis
7,090.336 km
Eccentricity
0.00618
Inclination
85.9584°
RAAN
254.5271°
Arg. of periapsis
23.568°
True anomaly
Unknown
Mean anomaly
336.8334°
Eccentric anomaly
Unknown
Mean motion
3.63532 °/min
Orbital period
99.03 mins
BSTAR
0.0014885
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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.
8 mins2025-07-03 16:19:28.164Z14.615° NNE2025-07-03 16:23:28.164Z91.31° ESE35.195°2025-07-03 16:27:28.164Z153.571° SSE
5 mins2025-07-03 18:00:28.164Z305.536° NW2025-07-03 18:02:28.164Z276.443° WNW17.487°2025-07-03 18:05:28.164Z238.236° WSW
7 mins2025-07-04 05:06:28.164Z172.103° S2025-07-04 05:09:28.164Z51.967° ENE43.353°2025-07-04 05:13:28.164Z7.001° NNE
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