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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Identifier
48274, 2021-035A
Orbit
LEO
Last TLE update
2 days ago
Origin
Manufacturer
CAST
Mission
Operational Civil Spaceship
Bus & Motor
TIANHE, Unknown motor
Mass
22,500 kg wet, ~20,838 kg dry
Launch date (UTC)
2021-04-29 (4 years ago)
Launch vehicle
CHANG ZHENG 5B
Launch site
Wenchang Satellite Launch Center (WSC)
Object type
Payload
Rocket body
Debris
Shape & HBR
Step Cyl + 2 Pan, 30 m
Radar Cross Section
85.800 m², Large (>1 m²)

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TLE from 2 days ago
0 CSS (TIANHE-1)
1 48274U 21035A   25118.97327954  .00041566  00000-0  46301-3 0  9998
2 48274  41.4635 319.9765 0003182 250.3142 109.7354 15.62051552228464
Epoch: 2025-04-28T23:21Z
Definitive object data (Epoch: 2025-04-28T23:21:31.352Z)
Latitude
-0.00001°
Longitude
112.41624°
Altitude
382.057 km
Speed
7.682 km/s
True Right ascension
21h 19m 54s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at TLE epoch
Visualization TLE readout
Latitude
-6.18299°
Longitude
-72.87626°
Altitude
381.338 km
Speed
7.683 km/s
Apparent Right ascension
11h 46m 52s
Apparent Declination
-57° 29' 26"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
07:19:59
Azimuth
147.772° SSE
Elevation
-22.222°
Doppler factor
1
Orbital elements
Apogee altitude
386.119 km
Perigee altitude
381.815 km
Semi-major axis
6,762.104 km
Eccentricity
0.0003182
Inclination
41.4635°
RAAN
319.9765°
Arg. of periapsis
250.3142°
True anomaly
109.76972°
Mean anomaly
109.7354°
Eccentric anomaly
109.75256°
Mean motion
3.9032 °/min
BSTAR
0.00046301
Orbital period
92.23 mins
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Other satellites on launch #35 in the year 2021 (2021-04-29 UTC)

CSS (TIANHE-1) Visibility forecast

Observer location: undefined°, undefined°

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Start Az.
Max El. time (UTC)
Max El. Az.
Max El.
End time (UTC)
End Az.
4 mins2025-05-01 16:01:48.189Z213.883° SW2025-05-01 16:03:48.189Z156.376° SSE29.249°2025-05-01 16:05:48.189Z96.47° ESE
4 mins2025-05-01 17:38:48.189Z268.207° W2025-05-01 17:40:48.189Z45.033° ENE42.375°2025-05-01 17:42:48.189Z75.669° E
4 mins2025-05-01 19:15:48.189Z287.682° WNW2025-05-01 19:17:48.189Z65.019° ENE40.716°2025-05-01 19:19:48.189Z91.906° ESE
4 mins2025-05-01 20:52:48.189Z253.627° W2025-05-01 20:53:48.189Z217.462° SW31.022°2025-05-01 20:56:48.189Z135.641° SSE
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