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TIANHUI 4B, 50573

Orbit data source: Space-Track

TIANHUI 4B, 50573 is a payload satellite owned by G. Cehui dili (CN) in LEO that was launched on Wed, 29 Dec 2021 UTC via a CHANG ZHENG 2D launch vehicle from the Jiuquan Satellite Launch Center, China (JSC). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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Iframe URL

https://www.satcat.com/sats-embedded/50573?theme=dark&initialShowStats=false

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Identifier

50573, 2021-134B

Orbit

LEO

Country

CN / PRC

Related business

China Aerospace Science and Technology Corporation (CASC) (CN)

Manufacturer

DFH

Mission

Operational Civil Science

Bus & Motor

CAST-2000?, Unknown motor

Mass

~1,000 kg wet, ~1,000 kg dry

Launch date (UTC)

2021-12-29 (4 years ago)

Launch vehicle

CHANG ZHENG 2D

Launch site

Jiuquan Satellite Launch Center, China (JSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 1.5 m

Radar Cross Section

2.045 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 23 hours ago

TLE from 23 hours ago

0 TIANHUI 4B
1 50573U 21134B   26172.49781278  .00005831  00000-0  11651-3 0  9999
2 50573  88.9711 322.0893 0010374  65.0696 295.1640 15.46547094250504

Epoch: 2026-06-21T11:56Z

TLE epoch observation values (Epoch: 2026-06-21T11:56:51.024Z)

Latitude

-0.00007°

Longitude

-126.82053°

Altitude

427.072 km

Speed

7.657 km/s

True Right ascension

21h 28m 21s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

21:32:14

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

430.665 km

Perigee altitude

416.552 km

Semi-major axis

6,801.746 km

Eccentricity

0.00104

Inclination

88.9711°

RAAN

322.0893°

Arg. of periapsis

65.0696°

True anomaly

295.05635°

Mean anomaly

295.164°

Eccentric anomaly

295.11018°

Mean motion

3.86912 °/min

Orbital period

93.04 mins

BSTAR

0.00011651

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Other satellites on launch #134 in the year 2021 (2021-12-29 UTC)

TIANHUI 4A, 50572

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TIANHUI 4B 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	2026-06-22 22:41:13.304Z	330.027° NNW	2026-06-22 22:43:13.304Z	256.056° W	30.699°	2026-06-22 22:45:13.304Z	210.54° SW

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out TIANHUI 4B, 50573 on other resources

View TIANHUI 4B, 50573 on NASA - NSSDCA Website

View TIANHUI 4B, 50573 on Heavens-Above

View TIANHUI 4B, 50573 on Keep Track

View TIANHUI 4B, 50573 on Celestrak

View TIANHUI 4B, 50573 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

TIANHUI 4B, 50573

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2026-06-21T11:56:51.024Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #134 in the year 2021 (2021-12-29 UTC)

TIANHUI 4B Visibility forecast

Co-orbital & Co-planar RSOs

Check out TIANHUI 4B, 50573 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 23 hours ago