FENGYUN 1C DEB, 33721 (Decayed)
Orbit data source: Space-Track
FENGYUN 1C DEB, 33721 was 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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33721 intel report (Beta)
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Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
Unknown
Mission
Decayed 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 33721U 99025DHJ 25314.99962867 .02578278 51415-2 68686-2 0 9995
2 33721 98.7767 148.3318 0010107 23.0653 337.1071 15.95755922973537Epoch: 2025-11-10T23:59Z
TLE epoch observation values (Epoch: 2025-11-10T23:59:27.917Z)
Latitude
0.00007°
Longitude
98.07299°
Altitude
283.152 km
Speed
7.741 km/s
True Right ascension
09h 53m 19s
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
23:39:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
289.873 km
Perigee altitude
276.408 km
Semi-major axis
6,661.278 km
Eccentricity
0.00101
Inclination
98.7767°
RAAN
148.3318°
Arg. of periapsis
23.0653°
True anomaly
337.06199°
Mean anomaly
337.1071°
Eccentric anomaly
337.08455°
Mean motion
3.99215 °/min
Orbital period
90.18 mins
BSTAR
0.0068686
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-02-09 21:23:48.924Z | 14.656° NNE | 2026-02-09 21:26:48.924Z | 292.746° NW | 37.349° | 2026-02-09 21:29:48.924Z | 216.271° SW |
| 5 mins | 2026-02-09 21:40:48.924Z | 345.289° N | 2026-02-09 21:42:48.924Z | 290.166° WNW | 36.028° | 2026-02-09 21:45:48.924Z | 226.802° WSW |
| 8 mins | 2026-02-09 21:58:48.924Z | 9.602° NNE | 2026-02-09 22:02:48.924Z | 297.954° NW | 34.617° | 2026-02-09 22:06:48.924Z | 235.978° WSW |
| 27 mins | 2026-02-09 22:27:48.924Z | 16.912° NNE | 2026-02-09 22:35:48.924Z | 313.941° NW | 32.241° | 2026-02-09 22:54:48.924Z | 246.071° WSW |
| 26 mins | 2026-02-09 23:05:48.924Z | 253.031° W | 2026-02-09 23:22:48.924Z | 332.031° NNW | 29.112° | 2026-02-09 23:31:48.924Z | 46.735° ENE |
| 7 mins | 2026-02-09 23:52:48.924Z | 293.219° NW | 2026-02-09 23:55:48.924Z | 342.795° N | 27.663° | 2026-02-09 23:59:48.924Z | 51.753° ENE |
| 5 mins | 2026-02-10 00:13:48.924Z | 306.697° NW | 2026-02-10 00:15:48.924Z | 351.908° N | 27.305° | 2026-02-10 00:18:48.924Z | 60.429° ENE |
| 4 mins | 2026-02-10 19:05:48.924Z | 339.572° N | 2026-02-10 19:06:48.924Z | 290.784° WNW | 44.103° | 2026-02-10 19:09:48.924Z | 183.768° SSW |
| 5 mins | 2026-02-10 19:19:48.924Z | 340.845° N | 2026-02-10 19:21:48.924Z | 238.316° WSW | 43.351° | 2026-02-10 19:24:48.924Z | 185.927° SSW |
| 7 mins | 2026-02-10 19:35:48.924Z | 351.44° N | 2026-02-10 19:38:48.924Z | 272.885° WNW | 43.317° | 2026-02-10 19:42:48.924Z | 192.13° SSW |
| 12 mins | 2026-02-10 19:57:48.924Z | 356.64° N | 2026-02-10 20:02:48.924Z | 284.565° WNW | 42.391° | 2026-02-10 20:09:48.924Z | 198.21° 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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