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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

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/55131?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

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

15 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, 30 m

Radar Cross Section

34.063 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 15 hours ago

0 SJ-23
1 55131U 23002A   25191.79340628 -.00000164  00000-0  00000-0 0  9991
2 55131   2.8367  82.7361 0001415  99.6022 120.9367  1.00068316  9089

Epoch: 2025-07-10T19:02Z

TLE epoch observation values (Epoch: 2025-07-10T19:02:30.302Z)

Latitude

-1.8721°

Longitude

88.67939°

Altitude

35,846.564 km

Speed

3.072 km/s

True Right ascension

20h 13m 02s

True Declination

-1° 52' 13"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

2.85519°

Longitude

-45.81567°

Altitude

35,837.163 km

Speed

3.073 km/s

Apparent Right ascension

11h 09m 32s

Apparent Declination

-2° 24' 12"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

22:21:39

Azimuth

340.797° N

Elevation

-50.946°

Doppler factor

Orbital elements

Apogee altitude

35,850.771 km

Perigee altitude

35,838.822 km

Semi-major axis

42,222.934 km

Eccentricity

0.00014

Inclination

2.8367°

RAAN

82.7361°

Arg. of periapsis

99.6022°

True anomaly

Unknown

Mean anomaly

120.9367°

Eccentric anomaly

Unknown

Mean motion

0.25016 °/min

Orbital period

1,439.07 mins

BSTAR

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55131 neighbors

Authenticating...

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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

Authenticating...

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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.