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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). Payloads include a variety of satellites, spacecraft, and rockets 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

Identifier	55131, 2023-002A
Orbit	GEO
Last TLE update	22 hours ago
Origin	PLA SSF (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 (2 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 22 hours ago

0 SJ-23
1 55131U 23002A   25074.87711288 -.00000108  00000-0  00000-0 0  9992
2 55131   2.5354  84.1848 0000521 325.2085 244.4612  1.00094039  7918

Epoch: 2025-03-15T21:03Z

Definitive object data (Epoch: 2025-03-15T21:03:02.552Z)

Latitude	-1.23187°
Longitude	164.36445°
Altitude	35,837.097 km
Speed	3.073 km/s
True Right ascension	19h 35m 21s
True Declination	-1° 13' 50"
Sunlit	Object was in daylight at TLE epoch

Visualization TLE readout

Latitude	0.16024°
Longitude	131.65208°
Altitude	35,837.824 km
Speed	3.073 km/s
Apparent Right ascension	16h 58m 06s
Apparent Declination	-5° 18' 09"
Sunlit	Object is in daylight

Visualization observer readout

Local Sidereal Time	23:28:48
Azimuth	270.839° WNW
Elevation	-9.282°
Doppler factor	1

Orbital elements

Apogee altitude	35,839.763 km
Perigee altitude	35,835.364 km
Semi-major axis	42,215.7 km
Eccentricity	0.0000521
Inclination	2.5354°
RAAN	84.1848°
Arg. of periapsis	325.2085°
True anomaly	244.45581°
Mean anomaly	244.4612°
Eccentric anomaly	244.45851°
Mean motion	0.25023 °/min
BSTAR	Unknown
Orbital period	1438.7 mins