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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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, 38.9 m
Radar Cross Section
2905.500 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 20 hours ago
TLE from 20 hours ago
0 CSS (TIANHE-1)
1 48274U 21035A 26259.56926822 .00022537 00000-0 27412-3 0 9998
2 48274 41.4673 127.1771 0002634 283.8844 76.1701 15.60008303307435Epoch: 2026-09-16T13:39Z
TLE epoch observation values (Epoch: 2026-09-16T13:39:44.774Z)
Latitude
-0.00003°
Longitude
-73.27848°
Altitude
386.807 km
Speed
7.68 km/s
True Right ascension
08h 28m 42s
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
02:00:34
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
391.648 km
Perigee altitude
388.083 km
Semi-major axis
6,768.003 km
Eccentricity
0.00026
Inclination
41.4673°
RAAN
127.1771°
Arg. of periapsis
283.8844°
True anomaly
76.19941°
Mean anomaly
76.1701°
Eccentric anomaly
76.18476°
Mean motion
3.89809 °/min
Orbital period
92.35 mins
BSTAR
0.00027412
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-09-17 19:06:45.432Z | 226.048° WSW | 2026-09-17 19:08:45.432Z | 126.138° SE | 47.827° | 2026-09-17 19:10:45.432Z | 84.491° E |
| 4 mins | 2026-09-17 20:43:45.432Z | 280.899° WNW | 2026-09-17 20:44:45.432Z | 306.251° NW | 54.334° | 2026-09-17 20:47:45.432Z | 76.814° E |
| 4 mins | 2026-09-17 22:20:45.432Z | 284.651° WNW | 2026-09-17 22:22:45.432Z | 96.152° ESE | 60.536° | 2026-09-17 22:24:45.432Z | 101.79° 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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