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: 6 hours ago
TLE from 6 hours ago
0 YAOGAN-39 01C
1 57731U 23130E 26260.28085748 .00005109 00000-0 25459-3 0 9993
2 57731 34.9934 298.4952 0009511 63.9164 296.2527 15.16913885169456Epoch: 2026-09-17T06:44Z
TLE epoch observation values (Epoch: 2026-09-17T06:44:26.086Z)
Latitude
0.00001°
Longitude
-158.83383°
Altitude
511.189 km
Speed
7.612 km/s
True Right ascension
19h 53m 58s
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
05:53:10
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
524.976 km
Perigee altitude
511.858 km
Semi-major axis
6,896.554 km
Eccentricity
0.00095
Inclination
34.9934°
RAAN
298.4952°
Arg. of periapsis
63.9164°
True anomaly
296.1549°
Mean anomaly
296.2527°
Eccentric anomaly
296.20381°
Mean motion
3.78961 °/min
Orbital period
95 mins
BSTAR
0.00025459
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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 | 2026-09-18 06:40:42.988Z | 217.723° SW | 2026-09-18 06:43:42.988Z | 166.689° S | 24.696° | 2026-09-18 06:46:42.988Z | 110.525° ESE |
| 5 mins | 2026-09-18 08:21:42.988Z | 233.68° WSW | 2026-09-18 08:23:42.988Z | 177° S | 39.992° | 2026-09-18 08:26:42.988Z | 111.735° ESE |
| 5 mins | 2026-09-18 10:01:42.988Z | 238.667° WSW | 2026-09-18 10:03:42.988Z | 188.695° SSW | 30.478° | 2026-09-18 10:06:42.988Z | 133.116° 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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