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.
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
48274 intel report (Beta)
Focus sentinelFocus sentinel
CSS (TIANHE-1) radio frequencies
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
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
Step Cyl + 2 Pan, 15.0 m
Radar Cross Section
85.800 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 18 hours ago
TLE from 18 hours ago
0 CSS (TIANHE-1)
1 48274U 21035A 25260.16547873 .00024183 00000-0 29787-3 0 9996
2 48274 41.4642 183.0293 0003585 359.2937 0.7896 15.59643017250506Epoch: 2025-09-17T03:58Z
TLE epoch observation values (Epoch: 2025-09-17T03:58:17.362Z)
Latitude
0.00001°
Longitude
127.11162°
Altitude
385.863 km
Speed
7.682 km/s
True Right ascension
12h 12m 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
15:00:28
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
393.349 km
Perigee altitude
388.495 km
Semi-major axis
6,769.059 km
Eccentricity
0.00036
Inclination
41.4642°
RAAN
183.0293°
Arg. of periapsis
359.2937°
True anomaly
0.79017°
Mean anomaly
0.7896°
Eccentric anomaly
0.78988°
Mean motion
3.89718 °/min
Orbital period
92.37 mins
BSTAR
0.00029787
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #35 in the year 2021 (2021-04-29 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.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 | 2025-09-17 22:38:34.197Z | 221.387° SW | 2025-09-17 22:40:34.197Z | 174.378° S | 30.828° | 2025-09-17 22:43:34.197Z | 87.96° E |
| 4 mins | 2025-09-18 00:16:34.197Z | 275.016° WNW | 2025-09-18 00:17:34.197Z | 316.114° NNW | 42.913° | 2025-09-18 00:20:34.197Z | 76.9° E |
| 4 mins | 2025-09-18 01:53:34.197Z | 289.078° WNW | 2025-09-18 01:54:34.197Z | 320.091° NNW | 42.994° | 2025-09-18 01:57:34.197Z | 95.119° 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 ascending order |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
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 |
|---|