YAOGAN-39 01C, 57731
Orbit data source: Space-Track
YAOGAN-39 01C, 57731 is a payload satellite owned by PLA GAD (CN) in LEO that was launched on Thu, 31 Aug 2023 UTC via a CHANG ZHENG 2D launch vehicle from the Xichang Space Center, China (XSC). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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57731 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
DFH
Mission
Operational Defense Sigint
Bus & Motor
Unknown
Mass
~300 kg wet, ~300 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 2.5 m
Radar Cross Section
11.063 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 8 hours ago
TLE from 8 hours ago
0 YAOGAN-39 01C
1 57731U 23130E 25340.91809824 .00009778 00000-0 47655-3 0 9998
2 57731 34.9938 270.6655 0007531 242.7299 117.2647 15.17564837126243Epoch: 2025-12-06T22:02Z
TLE epoch observation values (Epoch: 2025-12-06T22:02:03.687Z)
Latitude
-0.00003°
Longitude
-135.78886°
Altitude
514.492 km
Speed
7.607 km/s
True Right ascension
18h 02m 39s
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
04:23:43
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
521.639 km
Perigee altitude
511.254 km
Semi-major axis
6,894.583 km
Eccentricity
0.00075
Inclination
34.9938°
RAAN
270.6655°
Arg. of periapsis
242.7299°
True anomaly
117.34138°
Mean anomaly
117.2647°
Eccentric anomaly
117.30304°
Mean motion
3.79124 °/min
Orbital period
94.96 mins
BSTAR
0.00047655
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Other satellites on launch #130 in the year 2023 (2023-08-31 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.YAOGAN-39 01C 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 | 2025-12-07 23:33:05.336Z | 215.033° SW | 2025-12-07 23:36:05.336Z | 157.135° SSE | 23.201° | 2025-12-07 23:39:05.336Z | 107.243° ESE |
| 6 mins | 2025-12-08 01:13:05.336Z | 240.37° WSW | 2025-12-08 01:16:05.336Z | 160.677° S | 31.844° | 2025-12-08 01:19:05.336Z | 110.061° ESE |
| 5 mins | 2025-12-08 02:53:05.336Z | 245.357° WSW | 2025-12-08 02:55:05.336Z | 205.678° SW | 25.855° | 2025-12-08 02:58:05.336Z | 139.725° SSE |
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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