CSS (TIANHE-1), 48274
Orbit data source: Space-Track
The Chinese Space Station (CSS), known as Tiangong or "Heavenly Palace," is China's independently developed space station that represents a significant step in China’s space exploration capabilities. Launched in phases starting with the Tianhe module in 2021, the station operates in low Earth orbit (LEO). It aims to support a variety of scientific experiments in fields such as space medicine, astronomy, and technology development.
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48274 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
CAST
Mission
Operational Civil Spaceship
Bus & Motor
TIANHE, Unknown motor
Mass
22,500 kg wet, ~20,838 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Irr, 27.5 m
Radar Cross Section
2905.500 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 CSS (TIANHE-1)
1 48274U 21035A 25342.61491639 .00028320 00000-0 35728-3 0 9994
2 48274 41.4682 41.7451 0009131 357.4459 2.6332 15.58905517263389Epoch: 2025-12-08T14:45Z
TLE epoch observation values (Epoch: 2025-12-08T14:45:28.776Z)
Latitude
0.00005°
Longitude
102.76384°
Altitude
384.25 km
Speed
7.685 km/s
True Right ascension
02h 46m 58s
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
21:26:52
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
399.238 km
Perigee altitude
386.872 km
Semi-major axis
6,771.192 km
Eccentricity
0.00091
Inclination
41.4682°
RAAN
41.7451°
Arg. of periapsis
357.4459°
True anomaly
2.63801°
Mean anomaly
2.6332°
Eccentric anomaly
2.63561°
Mean motion
3.89534 °/min
Orbital period
92.42 mins
BSTAR
0.00035728
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Other satellites on launch #35 in the year 2021 (2021-04-29 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.CSS (TIANHE-1) Visibility forecast
Loading observer location...
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 | 2025-12-09 07:54:30.171Z | 220.816° SW | 2025-12-09 07:56:30.171Z | 160.085° S | 33.068° | 2025-12-09 07:59:30.171Z | 85.2° E |
| 5 mins | 2025-12-09 09:31:30.171Z | 271.323° WNW | 2025-12-09 09:33:30.171Z | 358.13° N | 43.329° | 2025-12-09 09:36:30.171Z | 77.577° E |
| 5 mins | 2025-12-09 11:08:30.171Z | 284.832° WNW | 2025-12-09 11:10:30.171Z | 349.26° N | 44.267° | 2025-12-09 11:13:30.171Z | 96.781° ESE |
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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