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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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: 7 hours ago
TLE from 7 hours ago
0 YAOGAN-39 01B
1 57728U 23130B 26260.28405212 .00004767 00000-0 23711-3 0 9999
2 57728 34.9945 298.5539 0009576 189.8326 170.2201 15.16995244169476Epoch: 2026-09-17T06:49Z
TLE epoch observation values (Epoch: 2026-09-17T06:49:02.103Z)
Latitude
0.00003°
Longitude
-159.92832°
Altitude
520.341 km
Speed
7.602 km/s
True Right ascension
19h 54m 12s
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
06:47:11
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
524.774 km
Perigee altitude
511.566 km
Semi-major axis
6,896.307 km
Eccentricity
0.00096
Inclination
34.9945°
RAAN
298.5539°
Arg. of periapsis
189.8326°
True anomaly
170.23872°
Mean anomaly
170.2201°
Eccentric anomaly
170.22941°
Mean motion
3.78982 °/min
Orbital period
94.99 mins
BSTAR
0.00023711
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-09-18 06:45:35.009Z | 218.482° SW | 2026-09-18 06:48:35.009Z | 165.566° S | 26.117° | 2026-09-18 06:51:35.009Z | 109.733° ESE |
| 5 mins | 2026-09-18 08:26:35.009Z | 233.752° WSW | 2026-09-18 08:28:35.009Z | 175.448° S | 40.595° | 2026-09-18 08:31:35.009Z | 111.997° ESE |
| 5 mins | 2026-09-18 10:06:35.009Z | 237.639° WSW | 2026-09-18 10:08:35.009Z | 187.896° SSW | 29.817° | 2026-09-18 10:11:35.009Z | 134.111° 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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