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: 19 hours ago
TLE from 19 hours ago
0 YAOGAN-39 01C
1 57731U 23130E 25259.66019344 .00005975 00000-0 29108-3 0 9997
2 57731 34.9943 57.3053 0001748 63.2098 296.8794 15.17702634113891Epoch: 2025-09-16T15:50Z
TLE epoch observation values (Epoch: 2025-09-16T15:50:40.713Z)
Latitude
0.00002°
Longitude
-176.21162°
Altitude
511.15 km
Speed
7.611 km/s
True Right ascension
03h 49m 13s
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
03:22:03
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
517.234 km
Perigee altitude
514.824 km
Semi-major axis
6,894.166 km
Eccentricity
0.00017
Inclination
34.9943°
RAAN
57.3053°
Arg. of periapsis
63.2098°
True anomaly
296.86153°
Mean anomaly
296.8794°
Eccentric anomaly
296.87047°
Mean motion
3.79158 °/min
Orbital period
94.95 mins
BSTAR
0.00029108
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2025-09-17 14:11:03.546Z | 197.706° SSW | 2025-09-17 14:13:03.546Z | 162.958° S | 18.029° | 2025-09-17 14:16:03.546Z | 112.817° SE |
| 5 mins | 2025-09-17 15:51:03.546Z | 225.472° WSW | 2025-09-17 15:53:03.546Z | 169.709° S | 30.918° | 2025-09-17 15:56:03.546Z | 108.932° ESE |
| 5 mins | 2025-09-17 17:31:03.546Z | 236.878° WSW | 2025-09-17 17:33:03.546Z | 179.764° S | 29.654° | 2025-09-17 17:36:03.546Z | 124.493° SE |
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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