TJS-21, 66586
Orbit data source: Space-Track
TJS-21, 66586 is a Chinese payload satellite in HEO that was launched on Fri, 21 Nov 2025 UTC via a CHANG ZHENG 3B 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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66586 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
SAST
Mission
Operational Defense Technology
Bus & Motor
TJS11, Unknown motor
Mass
~4,000 kg wet, ~2,500 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan + 1 Dish, 14.5 m
Radar Cross Section
63.841 m²
Expand to show TLE details & historyLast TLE update: 1 week ago
TLE from 1 week ago
0 TJS-21
1 66586U 25269A 25356.69533331 .00001087 00000-0 -73521-1 0 9995
2 66586 63.2754 161.3014 6807617 269.7248 18.6681 2.00587444 632Epoch: 2025-12-22T16:41Z
TLE epoch observation values (Epoch: 2025-12-22T16:41:16.797Z)
Latitude
0.00007°
Longitude
179.47276°
Altitude
7,933.312 km
Speed
6.38 km/s
True Right ascension
10h 45m 07s
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
14:22:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
38,258.574 km
Perigee altitude
2,100.012 km
Semi-major axis
26,557.43 km
Eccentricity
0.68076
Inclination
63.2754°
RAAN
161.3014°
Arg. of periapsis
269.7248°
True anomaly
90.36096°
Mean anomaly
18.6681°
Eccentric anomaly
47.36178°
Mean motion
0.50149 °/min
Orbital period
717.86 mins
BSTAR
-0.073521
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Other satellites on launch #269 in the year 2025 (2025-11-21 UTC)
Did you know?
You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.TJS-21 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. |
|---|---|---|---|---|---|---|---|
| 600 mins | 2026-01-01 16:26:26.630Z | 276.247° WNW | 2026-01-01 22:59:26.630Z | 319.961° NNW | 32.657° | 2026-01-02 02:26:26.630Z | 262.26° W |
| 338 mins | 2026-01-02 06:16:26.630Z | 37.581° NE | 2026-01-02 08:51:26.630Z | 27.904° NE | 17.443° | 2026-01-02 11:54:26.630Z | 32.232° NE |
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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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
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