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: 8 hours ago
TLE from 8 hours ago
0 YAOGAN-39 01B
1 57728U 23130B 25340.92204982 .00011930 00000-0 58015-3 0 9994
2 57728 34.9957 270.7060 0007021 174.4135 185.6657 15.17613273126266Epoch: 2025-12-06T22:07Z
TLE epoch observation values (Epoch: 2025-12-06T22:07:45.104Z)
Latitude
-0.00002°
Longitude
-137.17481°
Altitude
516.779 km
Speed
7.605 km/s
True Right ascension
18h 02m 49s
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
04:23:53
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
521.14 km
Perigee altitude
511.459 km
Semi-major axis
6,894.436 km
Eccentricity
0.0007
Inclination
34.9957°
RAAN
270.706°
Arg. of periapsis
174.4135°
True anomaly
185.65776°
Mean anomaly
185.6657°
Eccentric anomaly
185.66173°
Mean motion
3.79136 °/min
Orbital period
94.95 mins
BSTAR
0.00058015
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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
Loading observer location...
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 | 2025-12-07 23:39:14.349Z | 214.485° SW | 2025-12-07 23:42:14.349Z | 151.565° SSE | 23.519° | 2025-12-07 23:44:14.349Z | 114.47° SE |
| 6 mins | 2025-12-08 01:19:14.349Z | 239.134° WSW | 2025-12-08 01:21:14.349Z | 193.252° SSW | 32.109° | 2025-12-08 01:25:14.349Z | 109.586° ESE |
| 5 mins | 2025-12-08 02:59:14.349Z | 242.133° WSW | 2025-12-08 03:01:14.349Z | 198.978° SSW | 25.302° | 2025-12-08 03:04:14.349Z | 138.989° 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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