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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
Identifier
55131, 2023-002A
Orbit
GEO
Last TLE update
15 hours ago
Origin
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
1
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
0
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55131 neighbors
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Other satellites on launch #2 in the year 2023 (2023-01-08 UTC)

SJ-23 Visibility

Observer location: undefined°, undefined°

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