YAOGAN-39 01A, 57727
Orbit data source: Space-Track
YAOGAN-39 01A, 57727 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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57727 intel report (Beta)
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Edit Public Description
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: 17 hours ago
TLE from 17 hours ago
0 YAOGAN-39 01A
1 57727U 23130A 25359.10033696 .00011078 00000-0 46129-3 0 9991
2 57727 35.0010 143.5211 0003051 11.2993 348.7790 15.22956538129152Epoch: 2025-12-25T02:24Z
TLE epoch observation values (Epoch: 2025-12-25T02:24:29.113Z)
Latitude
0°
Longitude
13.53957°
Altitude
493.779 km
Speed
7.621 km/s
True Right ascension
09h 34m 05s
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
18:23:41
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
502.277 km
Perigee altitude
498.08 km
Semi-major axis
6,878.315 km
Eccentricity
0.00031
Inclination
35.001°
RAAN
143.5211°
Arg. of periapsis
11.2993°
True anomaly
348.77219°
Mean anomaly
348.779°
Eccentric anomaly
348.7756°
Mean motion
3.8047 °/min
Orbital period
94.62 mins
BSTAR
0.00046129
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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 01A 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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2025-12-26 13:15:58.517Z | 196.776° SSW | 2025-12-26 13:17:58.517Z | 158.617° S | 18.623° | 2025-12-26 13:19:58.517Z | 121.219° SE |
| 5 mins | 2025-12-26 14:54:58.517Z | 232.458° WSW | 2025-12-26 14:56:58.517Z | 186.604° SSW | 30.514° | 2025-12-26 14:59:58.517Z | 112.485° ESE |
| 5 mins | 2025-12-26 16:34:58.517Z | 237.669° WSW | 2025-12-26 16:36:58.517Z | 182.319° SSW | 28.606° | 2025-12-26 16:39:58.517Z | 126.358° 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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