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: 21 hours ago
TLE from 21 hours ago
0 YAOGAN-39 01A
1 57727U 23130A 25259.65920118 .00009877 00000-0 40774-3 0 9998
2 57727 35.0020 48.8818 0003166 194.5986 165.4638 15.23264953113980Epoch: 2025-09-16T15:49Z
TLE epoch observation values (Epoch: 2025-09-16T15:49:14.981Z)
Latitude
-0.00002°
Longitude
175.72303°
Altitude
497.014 km
Speed
7.617 km/s
True Right ascension
03h 15m 31s
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
05:50:17
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
501.428 km
Perigee altitude
497.073 km
Semi-major axis
6,877.388 km
Eccentricity
0.00032
Inclination
35.002°
RAAN
48.8818°
Arg. of periapsis
194.5986°
True anomaly
165.4729°
Mean anomaly
165.4638°
Eccentric anomaly
165.46835°
Mean motion
3.80547 °/min
Orbital period
94.6 mins
BSTAR
0.00040774
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2025-09-17 14:05:53.644Z | 209.912° SW | 2025-09-17 14:07:53.644Z | 173.195° S | 21.579° | 2025-09-17 14:10:53.644Z | 113.474° SE |
| 5 mins | 2025-09-17 15:45:53.644Z | 230.684° WSW | 2025-09-17 15:47:53.644Z | 169.651° S | 31.789° | 2025-09-17 15:50:53.644Z | 110.774° ESE |
| 5 mins | 2025-09-17 17:24:53.644Z | 243.873° WSW | 2025-09-17 17:26:53.644Z | 200.81° SSW | 26.079° | 2025-09-17 17:29:53.644Z | 136.408° 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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