FENGYUN 1C DEB, 33639
Orbit data source: Space-Track
FENGYUN 1C DEB, 33639 is space debris in SSO originally from a launch on Mon, 10 May 1999 UTC launched from the Taiyaun Space Center, China (TSC). Fengyun 1C debris stems from the Chinese weather satellite Fengyun-1C, which was intentionally destroyed by a Chinese anti-satellite missile in 2007. This event dramatically increased the amount of space debris, with thousands of trackable fragments posing hazards to satellites and human spaceflight. The Fengyun 1C debris cloud has become a focal point in discussions about space sustainability and the need for international regulations to prevent the creation of new debris.
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33639 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
Unknown
Mission
Spacecraft
Bus & Motor
Unknown
Mass
Unknown
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Unknown shape, 0.1 m
Radar Cross Section
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 3 months ago
TLE from 3 months ago
0 FENGYUN 1C DEB
1 33639U 99025DDY 25230.51029728 .00003517 00000-0 11531-2 0 9994
2 33639 98.7137 319.6045 0050841 274.2233 85.3144 14.38305010898656Epoch: 2025-08-18T12:14Z
TLE epoch observation values (Epoch: 2025-08-18T12:14:49.684Z)
Latitude
-0.0001°
Longitude
168.78171°
Altitude
764.26 km
Speed
7.474 km/s
True Right ascension
21h 18m 25s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
06:38:49
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
797.536 km
Perigee altitude
724.941 km
Semi-major axis
7,139.375 km
Eccentricity
0.00508
Inclination
98.7137°
RAAN
319.6045°
Arg. of periapsis
274.2233°
True anomaly
85.89534°
Mean anomaly
85.3144°
Eccentric anomaly
85.60484°
Mean motion
3.59793 °/min
Orbital period
100.06 mins
BSTAR
0.0011531
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Other satellites on launch #25 in the year 1999 (1999-05-10 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.FENGYUN 1C 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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-11-07 18:30:46.238Z | 30.473° NE | 2025-11-07 18:34:46.238Z | 89.878° E | 33.542° | 2025-11-07 18:39:46.238Z | 169.328° S |
| 5 mins | 2025-11-07 20:11:46.238Z | 325.366° NNW | 2025-11-07 20:13:46.238Z | 293.07° NW | 21.277° | 2025-11-07 20:16:46.238Z | 250.974° W |
| 7 mins | 2025-11-08 05:45:46.238Z | 139.908° SSE | 2025-11-08 05:48:46.238Z | 60.057° ENE | 38.829° | 2025-11-08 05:52:46.238Z | 357.33° N |
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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