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: 4 hours ago
TLE from 4 hours ago
0 CSS (TIANHE-1)
1 48274U 21035A 25312.83194167 .00042043 00000-0 49295-3 0 9993
2 48274 41.4657 222.5840 0005261 347.1900 12.8804 15.60711560258735Epoch: 2025-11-08T19:57Z
TLE epoch observation values (Epoch: 2025-11-08T19:57:59.760Z)
Latitude
-0.00004°
Longitude
-125.17094°
Altitude
381.731 km
Speed
7.685 km/s
True Right ascension
14h 50m 20s
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
20:37:22
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
391.394 km
Perigee altitude
384.274 km
Semi-major axis
6,765.971 km
Eccentricity
0.00053
Inclination
41.4657°
RAAN
222.584°
Arg. of periapsis
347.19°
True anomaly
12.89385°
Mean anomaly
12.8804°
Eccentric anomaly
12.88712°
Mean motion
3.89985 °/min
Orbital period
92.31 mins
BSTAR
0.00049295
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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
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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 | 2025-11-09 00:56:06.153Z | 282.337° WNW | 2025-11-09 00:59:06.153Z | 47.19° ENE | 40.672° | 2025-11-09 01:01:06.153Z | 85.915° E |
| 4 mins | 2025-11-09 02:34:06.153Z | 265.748° W | 2025-11-09 02:36:06.153Z | 166.325° S | 35.022° | 2025-11-09 02:38:06.153Z | 127.382° SE |
| 4 mins | 2025-11-09 22:21:06.153Z | 236.324° WSW | 2025-11-09 22:22:06.153Z | 200.195° SSW | 41.454° | 2025-11-09 22:25:06.153Z | 80.14° E |
| 4 mins | 2025-11-09 23:58:06.153Z | 288.804° WNW | 2025-11-09 23:59:06.153Z | 335.272° NNW | 41.279° | 2025-11-10 00:02:06.153Z | 80.857° E |
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 ascending 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 ascending order |
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