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: 22 hours ago
TLE from 22 hours ago
0 YAOGAN-39 04B
1 58143U 23163C 26172.53487584 .00004768 00000-0 23220-3 0 9995
2 58143 34.9949 341.7126 0004167 294.3521 65.6757 15.17767101147979Epoch: 2026-06-21T12:50Z
TLE epoch observation values (Epoch: 2026-06-21T12:50:13.272Z)
Latitude
-0.00001°
Longitude
-120.57647°
Altitude
510.318 km
Speed
7.612 km/s
True Right ascension
22h 46m 51s
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
21:49:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
518.707 km
Perigee altitude
512.961 km
Semi-major axis
6,893.971 km
Eccentricity
0.00042
Inclination
34.9949°
RAAN
341.7126°
Arg. of periapsis
294.3521°
True anomaly
65.71922°
Mean anomaly
65.6757°
Eccentric anomaly
65.69746°
Mean motion
3.79174 °/min
Orbital period
94.94 mins
BSTAR
0.0002322
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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 | 2026-06-22 15:58:25.287Z | 216.955° SW | 2026-06-22 16:00:25.287Z | 166.472° S | 28.115° | 2026-06-22 16:03:25.287Z | 108.071° ESE |
| 5 mins | 2026-06-22 17:38:25.287Z | 235.745° WSW | 2026-06-22 17:40:25.287Z | 174.728° S | 31.875° | 2026-06-22 17:43:25.287Z | 117.507° SE |
| 4 mins | 2026-06-22 19:18:25.287Z | 231.099° WSW | 2026-06-22 19:20:25.287Z | 187.74° SSW | 20.503° | 2026-06-22 19:22:25.287Z | 153.164° 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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