YAOGAN-39 01B, 57728
Orbit data source: Space-Track
YAOGAN-39 01B, 57728 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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57728 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
SAST
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: 16 hours ago
TLE from 16 hours ago
0 YAOGAN-39 01B
1 57728U 23130B 25259.86210781 .00008031 00000-0 39029-3 0 9992
2 57728 34.9950 56.1129 0012247 109.4392 250.7646 15.17662091113945Epoch: 2025-09-16T20:41Z
TLE epoch observation values (Epoch: 2025-09-16T20:41:26.114Z)
Latitude
0.00002°
Longitude
109.70779°
Altitude
514.607 km
Speed
7.607 km/s
True Right ascension
03h 44m 27s
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
05:50:18
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
524.595 km
Perigee altitude
507.708 km
Semi-major axis
6,894.289 km
Eccentricity
0.00122
Inclination
34.995°
RAAN
56.1129°
Arg. of periapsis
109.4392°
True anomaly
250.63216°
Mean anomaly
250.7646°
Eccentric anomaly
250.69837°
Mean motion
3.79148 °/min
Orbital period
94.95 mins
BSTAR
0.00039029
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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 01B 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 | 2025-09-17 14:17:54.127Z | 201.081° SSW | 2025-09-17 14:19:54.127Z | 166.055° S | 18.853° | 2025-09-17 14:22:54.127Z | 113.352° SE |
| 5 mins | 2025-09-17 15:57:54.127Z | 228.696° WSW | 2025-09-17 15:59:54.127Z | 174.786° S | 31.237° | 2025-09-17 16:02:54.127Z | 110.114° ESE |
| 5 mins | 2025-09-17 17:37:54.127Z | 238.479° WSW | 2025-09-17 17:39:54.127Z | 184.364° SSW | 28.915° | 2025-09-17 17:42:54.127Z | 126.897° 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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