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SJ-23, 55131

Orbit data source: Space-Track

SJ-23, 55131 is a payload satellite owned by PLA SSF (CN) in GEO that was launched on Sun, 08 Jan 2023 UTC via a CHANG ZHENG 7A launch vehicle from the Wenchang Satellite Launch Center (WSC). 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.

Not visible in the next 10 days

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Iframe URL

https://www.satcat.com/sats-embedded/55131?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

55131, 2023-002A

Orbit

GEO

Last TLE update

5 hours ago

Origin

Strategic Support Troops (CN / PRC)

Manufacturer

CAST?

Mission

Operational Civil Communications

Bus & Motor

DFH-4E?, DFH-4 LAE

Mass

~5,000 kg wet, ~2,500 kg dry

Launch date (UTC)

2023-01-08 (3 years ago)

Launch vehicle

CHANG ZHENG 7A

Launch site

Wenchang Satellite Launch Center (WSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 15.0 m

Radar Cross Section

34.063 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 5 hours ago

0 SJ-23
1 55131U 23002A   25199.76980881 -.00000113  00000-0  00000+0 0  9990
2 55131   2.8568  82.6296 0001693 116.3307  97.8002  1.00065787  9345

Epoch: 2025-07-18T18:28Z

TLE epoch observation values (Epoch: 2025-07-18T18:28:31.481Z)

Latitude

-1.62212°

Longitude

82.80556°

Altitude

35,845.137 km

Speed

3.073 km/s

True Right ascension

19h 47m 00s

True Declination

-1° 37' 14"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-2.65506°

Longitude

161.06346°

Altitude

35,851.438 km

Speed

3.072 km/s

Apparent Right ascension

00h 56m 48s

Apparent Declination

-7° 17' 55"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

12:28:49

Azimuth

347.264° N

Elevation

-56.786°

Doppler factor

Orbital elements

Apogee altitude

35,852.656 km

Perigee altitude

35,838.359 km

Semi-major axis

42,223.645 km

Eccentricity

0.00017

Inclination

2.8568°

RAAN

82.6296°

Arg. of periapsis

116.3307°

True anomaly

97.81942°

Mean anomaly

97.8002°

Eccentric anomaly

97.80981°

Mean motion

0.25016 °/min

Orbital period

1,439.11 mins

BSTAR

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Other satellites on launch #2 in the year 2023 (2023-01-08 UTC)

CZ-7A R/B, 55132

SJ-23 AKM, 55180

SJ-23 Visibility

Observer location: undefined°, undefined°

SJ-23 is likely not visible in the next few days

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55131 neighbors

Authenticating...

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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Check out SJ-23, 55131 on other resources

View SJ-23, 55131 on NASA - NSSDCA Website

View SJ-23, 55131 on Heavens-Above

View SJ-23, 55131 on Keep Track

View SJ-23, 55131 on Celestrak

View SJ-23, 55131 on Gunter's Space Page

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