YAOGAN-39 04B, 58143
Orbit data source: Space-Track
YAOGAN-39 04B, 58143 is a payload satellite owned by PLA GAD (CN) in LEO that was launched on Mon, 23 Oct 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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58143 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: 5 hours ago
TLE from 5 hours ago
0 YAOGAN-39 04B
1 58143U 23163C 26125.82636495 .00007113 00000-0 34819-3 0 9995
2 58143 34.9940 273.0373 0003244 234.5588 125.4822 15.17489977140877Epoch: 2026-05-05T19:49Z
TLE epoch observation values (Epoch: 2026-05-05T19:49:57.931Z)
Latitude
-0.00003°
Longitude
111.85024°
Altitude
513.636 km
Speed
7.608 km/s
True Right ascension
18h 12m 08s
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
09:06:21
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
518.909 km
Perigee altitude
514.436 km
Semi-major axis
6,894.81 km
Eccentricity
0.00032
Inclination
34.994°
RAAN
273.0373°
Arg. of periapsis
234.5588°
True anomaly
125.51246°
Mean anomaly
125.4822°
Eccentric anomaly
125.49733°
Mean motion
3.79105 °/min
Orbital period
94.96 mins
BSTAR
0.00034819
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Other satellites on launch #163 in the year 2023 (2023-10-23 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 04B 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 | 2026-05-06 13:26:10.627Z | 197.746° SSW | 2026-05-06 13:28:10.627Z | 163.819° S | 17.815° | 2026-05-06 13:31:10.627Z | 113.575° SE |
| 5 mins | 2026-05-06 15:06:10.627Z | 225.927° WSW | 2026-05-06 15:08:10.627Z | 172.207° S | 30.922° | 2026-05-06 15:11:10.627Z | 109.366° ESE |
| 5 mins | 2026-05-06 16:46:10.627Z | 238.267° WSW | 2026-05-06 16:48:10.627Z | 182.729° SSW | 30.085° | 2026-05-06 16:51:10.627Z | 124.646° SE |
| 4 mins | 2026-05-06 18:26:10.627Z | 230.474° WSW | 2026-05-06 18:28:10.627Z | 193.82° SSW | 16.247° | 2026-05-06 18:30:10.627Z | 162.693° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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