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: 12 hours ago
TLE from 12 hours ago
0 YAOGAN-39 04B
1 58143U 23163C 26085.68772907 .00006238 00000-0 31015-3 0 9995
2 58143 34.9930 163.2554 0003819 226.5045 133.5351 15.16978292134775Epoch: 2026-03-26T16:30Z
TLE epoch observation values (Epoch: 2026-03-26T16:30:19.791Z)
Latitude
0.00001°
Longitude
91.53985°
Altitude
515.702 km
Speed
7.607 km/s
True Right ascension
10h 53m 01s
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
10:13:32
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
520.856 km
Perigee altitude
515.588 km
Semi-major axis
6,896.359 km
Eccentricity
0.00038
Inclination
34.993°
RAAN
163.2554°
Arg. of periapsis
226.5045°
True anomaly
133.56682°
Mean anomaly
133.5351°
Eccentric anomaly
133.55096°
Mean motion
3.78977 °/min
Orbital period
94.99 mins
BSTAR
0.00031015
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-03-27 08:31:26.086Z | 192.124° SSW | 2026-03-27 08:33:26.086Z | 160.259° S | 15.531° | 2026-03-27 08:35:26.086Z | 126.056° SE |
| 5 mins | 2026-03-27 10:11:26.086Z | 220.625° SW | 2026-03-27 10:13:26.086Z | 167.708° S | 29.578° | 2026-03-27 10:16:26.086Z | 108.228° ESE |
| 5 mins | 2026-03-27 11:51:26.086Z | 237.314° WSW | 2026-03-27 11:53:26.086Z | 178.915° S | 31.303° | 2026-03-27 11:56:26.086Z | 120.653° SE |
| 4 mins | 2026-03-27 13:31:26.086Z | 231.752° WSW | 2026-03-27 13:33:26.086Z | 191.876° SSW | 18.696° | 2026-03-27 13:35:26.086Z | 158.263° 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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