FENGYUN 1C DEB, 31666
Orbit data source: Space-Track
FENGYUN 1C DEB, 31666 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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31666 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: 12 hours ago
TLE from 12 hours ago
0 FENGYUN 1C DEB
1 31666U 99025CBY 25308.84281379 .00026783 00000-0 34936-2 0 9990
2 31666 98.6567 94.4458 0028449 267.8650 91.9302 14.80218141967107Epoch: 2025-11-04T20:13Z
TLE epoch observation values (Epoch: 2025-11-04T20:13:39.111Z)
Latitude
-0.00001°
Longitude
106.70881°
Altitude
632.362 km
Speed
7.542 km/s
True Right ascension
06h 17m 46s
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
04:38:32
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
645.637 km
Perigee altitude
605.786 km
Semi-major axis
7,003.849 km
Eccentricity
0.00284
Inclination
98.6567°
RAAN
94.4458°
Arg. of periapsis
267.865°
True anomaly
92.25598°
Mean anomaly
91.9302°
Eccentric anomaly
92.09309°
Mean motion
3.70287 °/min
Orbital period
97.22 mins
BSTAR
0.0034936
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-11-05 09:19:40.119Z | 141.96° SSE | 2025-11-05 09:23:40.119Z | 73.492° E | 34.582° | 2025-11-05 09:27:40.119Z | 1.194° NNE |
| 4 mins | 2025-11-05 10:58:40.119Z | 243.933° WSW | 2025-11-05 10:59:40.119Z | 259.423° W | 15.542° | 2025-11-05 11:02:40.119Z | 303.533° NW |
| 7 mins | 2025-11-05 22:45:40.119Z | 14.781° NNE | 2025-11-05 22:48:40.119Z | 29.946° NE | 44.377° | 2025-11-05 22:52:40.119Z | 193.247° SSW |
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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