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 25354.60088334 .00003581 00000-0 17491-3 0 9995
2 57731 34.9913 185.3107 0006732 352.2940 7.7668 15.17742856128328Epoch: 2025-12-20T14:25Z
TLE epoch observation values (Epoch: 2025-12-20T14:25:16.320Z)
Latitude
-0.00006°
Longitude
-120.43273°
Altitude
506.978 km
Speed
7.615 km/s
True Right ascension
12h 21m 14s
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
21:52:53
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
520.549 km
Perigee altitude
511.267 km
Semi-major axis
6,894.045 km
Eccentricity
0.00067
Inclination
34.9913°
RAAN
185.3107°
Arg. of periapsis
352.294°
True anomaly
7.77723°
Mean anomaly
7.7668°
Eccentric anomaly
7.77202°
Mean motion
3.79168 °/min
Orbital period
94.94 mins
BSTAR
0.00017491
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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 | 2025-12-21 17:33:15.925Z | 219.379° SW | 2025-12-21 17:35:15.925Z | 172.542° S | 27.895° | 2025-12-21 17:38:15.925Z | 109.611° ESE |
| 5 mins | 2025-12-21 19:13:15.925Z | 238.388° WSW | 2025-12-21 19:15:15.925Z | 182.063° SSW | 32.043° | 2025-12-21 19:18:15.925Z | 118.62° SE |
| 4 mins | 2025-12-21 20:53:15.925Z | 234.139° WSW | 2025-12-21 20:55:15.925Z | 191.868° SSW | 20.808° | 2025-12-21 20:57:15.925Z | 155.183° 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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