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: 17 hours ago
TLE from 17 hours ago
0 YAOGAN-39 01C
1 57731U 23130E 25293.99727620 .00011254 00000-0 56245-3 0 9993
2 57731 34.9935 203.0949 0006057 191.5582 168.4993 15.16675793119117Epoch: 2025-10-20T23:56Z
TLE epoch observation values (Epoch: 2025-10-20T23:56:04.663Z)
Latitude
0.00002°
Longitude
174.38394°
Altitude
518.896 km
Speed
7.604 km/s
True Right ascension
13h 32m 22s
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
11:59:14
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
523.316 km
Perigee altitude
514.96 km
Semi-major axis
6,897.275 km
Eccentricity
0.00061
Inclination
34.9935°
RAAN
203.0949°
Arg. of periapsis
191.5582°
True anomaly
168.51313°
Mean anomaly
168.4993°
Eccentric anomaly
168.50622°
Mean motion
3.78902 °/min
Orbital period
95.01 mins
BSTAR
0.00056245
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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 | 2025-10-21 22:19:09.059Z | 213.273° SW | 2025-10-21 22:21:09.059Z | 174.938° S | 23.988° | 2025-10-21 22:24:09.059Z | 112.87° SE |
| 5 mins | 2025-10-21 23:59:09.059Z | 238.547° WSW | 2025-10-22 00:01:09.059Z | 190.518° SSW | 32.424° | 2025-10-22 00:04:09.059Z | 115.812° SE |
| 5 mins | 2025-10-22 01:39:09.059Z | 241.93° WSW | 2025-10-22 01:41:09.059Z | 198.914° SSW | 25.241° | 2025-10-22 01:44:09.059Z | 139.427° 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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