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
6 hours 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)

Expand to show TLE details & history

TLE from 6 hours ago
0 CSS (TIANHE-1)
1 48274U 21035A   25167.55246618  .00023445  00000-0  29708-3 0  9991
2 48274  41.4647  24.5132 0003766 111.0574 249.0667 15.58908579236058
Epoch: 2025-06-16T13:15Z
TLE epoch observation values (Epoch: 2025-06-16T13:15:33.077Z)
Latitude
-0.00004°
Longitude
-79.43624°
Altitude
391.325 km
Speed
7.677 km/s
True Right ascension
01h 38m 03s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
36.40789°
Longitude
-24.96832°
Altitude
390.671 km
Speed
7.682 km/s
Apparent Right ascension
01h 10m 18s
Apparent Declination
-2° 41' 48"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
06:21:34
Azimuth
260.047° W
Elevation
7.556°
Doppler factor
1
Orbital elements
Apogee altitude
395.597 km
Perigee altitude
390.497 km
Semi-major axis
6,771.184 km
Eccentricity
0.00038
Inclination
41.4647°
RAAN
24.5132°
Arg. of periapsis
111.0574°
True anomaly
Unknown
Mean anomaly
249.0667°
Eccentric anomaly
Unknown
Mean motion
3.89535 °/min
Orbital period
92.42 mins
BSTAR
0.00029708
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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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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 mins2025-06-16 19:41:45.233Z260.506° W2025-06-16 19:44:45.233Z63.243° ENE42.13°2025-06-16 19:46:45.233Z76.357° E
4 mins2025-06-16 21:19:45.233Z287.193° WNW2025-06-16 21:21:45.233Z46.265° ENE41.401°2025-06-16 21:23:45.233Z87.363° E
4 mins2025-06-16 22:56:45.233Z265.479° W2025-06-16 22:58:45.233Z178.41° S34.592°2025-06-16 23:00:45.233Z131.506° SE
5 mins2025-06-17 18:44:45.233Z245.494° WSW2025-06-17 18:46:45.233Z140.922° SSE43.653°2025-06-17 18:49:45.233Z78.558° E
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