FENGYUN 1C DEB, 31721
Orbit data source: Space-Track
FENGYUN 1C DEB, 31721 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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31721 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: 1 day ago
TLE from 1 day ago
0 FENGYUN 1C DEB
1 31721U 99025CDU 25352.78972546 .00000311 00000-0 26542-3 0 9991
2 31721 99.7815 332.5593 0317555 167.8662 315.5677 13.73783105674691Epoch: 2025-12-18T18:57Z
TLE epoch observation values (Epoch: 2025-12-18T18:57:12.279Z)
Latitude
57.91746°
Longitude
156.49353°
Altitude
832.436 km
Speed
7.524 km/s
True Right ascension
11h 13m 44s
True Declination
57° 45' 51"
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
04:50:05
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,217.056 km
Perigee altitude
749.524 km
Semi-major axis
7,361.427 km
Eccentricity
0.03176
Inclination
99.7815°
RAAN
332.5593°
Arg. of periapsis
167.8662°
True anomaly
312.94691°
Mean anomaly
315.5677°
Eccentric anomaly
314.26475°
Mean motion
3.43637 °/min
Orbital period
104.76 mins
BSTAR
0.00026542
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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 | 2025-12-20 11:10:15.860Z | 31.839° NE | 2025-12-20 11:15:15.860Z | 111.742° ESE | 31.18° | 2025-12-20 11:19:15.860Z | 166.727° S |
| 6 mins | 2025-12-20 12:55:15.860Z | 337.578° N | 2025-12-20 12:58:15.860Z | 292.398° WNW | 21.518° | 2025-12-20 13:01:15.860Z | 250.701° W |
| 7 mins | 2025-12-20 21:14:15.860Z | 92.813° ESE | 2025-12-20 21:17:15.860Z | 60.808° ENE | 19.508° | 2025-12-20 21:21:15.860Z | 19.225° NNE |
| 12 mins | 2025-12-20 22:54:15.860Z | 171.96° S | 2025-12-20 23:00:15.860Z | 273.067° WNW | 43.795° | 2025-12-20 23:06:15.860Z | 341.038° 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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