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: 6 hours ago
TLE from 6 hours ago
0 YAOGAN-39 01A
1 57727U 23130A 25354.83943537 .00005825 00000-0 24317-3 0 9998
2 57727 35.0005 170.3164 0003628 334.7938 25.2600 15.22991617128505Epoch: 2025-12-20T20:08Z
TLE epoch observation values (Epoch: 2025-12-20T20:08:47.215Z)
Latitude
0.00001°
Longitude
138.45921°
Altitude
493.475 km
Speed
7.622 km/s
True Right ascension
11h 21m 15s
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
01:36:32
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
502.568 km
Perigee altitude
497.577 km
Semi-major axis
6,878.21 km
Eccentricity
0.00036
Inclination
35.0005°
RAAN
170.3164°
Arg. of periapsis
334.7938°
True anomaly
25.27775°
Mean anomaly
25.26°
Eccentric anomaly
25.26887°
Mean motion
3.80478 °/min
Orbital period
94.62 mins
BSTAR
0.00024317
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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 | 2025-12-21 15:15:18.363Z | 187.468° SSW | 2025-12-21 15:17:18.363Z | 153.033° SSE | 15.037° | 2025-12-21 15:19:18.363Z | 120.624° SE |
| 5 mins | 2025-12-21 16:54:18.363Z | 223.683° SW | 2025-12-21 16:56:18.363Z | 174.669° S | 28.991° | 2025-12-21 16:59:18.363Z | 109.628° ESE |
| 5 mins | 2025-12-21 18:34:18.363Z | 233.75° WSW | 2025-12-21 18:36:18.363Z | 170.346° S | 30.143° | 2025-12-21 18:39:18.363Z | 119.176° 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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