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: 12 hours ago
TLE from 12 hours ago
0 YAOGAN-39 01C
1 57731U 23130E 26079.93628418 .00006391 00000-0 31293-3 0 9997
2 57731 34.9940 342.0307 0002388 282.9155 77.1291 15.17508908142059Epoch: 2026-03-20T22:28Z
TLE epoch observation values (Epoch: 2026-03-20T22:28:14.953Z)
Latitude
-0.00001°
Longitude
-173.49581°
Altitude
511.915 km
Speed
7.61 km/s
True Right ascension
22h 48m 07s
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
15:42:24
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
518.262 km
Perigee altitude
514.969 km
Semi-major axis
6,894.753 km
Eccentricity
0.00024
Inclination
34.994°
RAAN
342.0307°
Arg. of periapsis
282.9155°
True anomaly
77.15578°
Mean anomaly
77.1291°
Eccentric anomaly
77.14244°
Mean motion
3.7911 °/min
Orbital period
94.96 mins
BSTAR
0.00031293
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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 | 2026-03-21 20:48:00.051Z | 197.414° SSW | 2026-03-21 20:50:00.051Z | 166.43° S | 16.188° | 2026-03-21 20:53:00.051Z | 116.43° SE |
| 5 mins | 2026-03-21 22:28:00.051Z | 225.905° WSW | 2026-03-21 22:30:00.051Z | 177.705° S | 30.036° | 2026-03-21 22:33:00.051Z | 110.418° ESE |
| 5 mins | 2026-03-22 00:08:00.051Z | 240.656° WSW | 2026-03-22 00:10:00.051Z | 188.177° SSW | 30.919° | 2026-03-22 00:13:00.051Z | 123.725° SE |
| 4 mins | 2026-03-22 01:48:00.051Z | 233.936° WSW | 2026-03-22 01:50:00.051Z | 196.329° SSW | 17.834° | 2026-03-22 01:52:00.051Z | 162.289° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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