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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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: 1 day ago
TLE from 1 day ago
0 YAOGAN-39 01C
1 57731U 23130E 26172.33549225 .00003683 00000-0 18751-3 0 9998
2 57731 34.9924 126.2271 0009608 348.2891 11.7597 15.16264501156097Epoch: 2026-06-21T08:03Z
TLE epoch observation values (Epoch: 2026-06-21T08:03:06.530Z)
Latitude
-0.00001°
Longitude
95.91264°
Altitude
509.568 km
Speed
7.615 km/s
True Right ascension
08h 24m 54s
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
23:19:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
527.012 km
Perigee altitude
513.756 km
Semi-major axis
6,898.521 km
Eccentricity
0.00096
Inclination
34.9924°
RAAN
126.2271°
Arg. of periapsis
348.2891°
True anomaly
11.78217°
Mean anomaly
11.7597°
Eccentric anomaly
11.77093°
Mean motion
3.78799 °/min
Orbital period
95.04 mins
BSTAR
0.00018751
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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 | 2026-06-23 01:26:10.915Z | 223.716° SW | 2026-06-23 01:28:10.915Z | 179.839° S | 28.53° | 2026-06-23 01:31:10.915Z | 111.319° ESE |
| 5 mins | 2026-06-23 03:06:10.915Z | 242.544° WSW | 2026-06-23 03:08:10.915Z | 194.663° SSW | 31.592° | 2026-06-23 03:11:10.915Z | 122.363° SE |
| 4 mins | 2026-06-23 04:47:10.915Z | 222.898° SW | 2026-06-23 04:48:10.915Z | 201.589° SSW | 20.062° | 2026-06-23 04:51:10.915Z | 150.619° 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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