SHIYAN 21 (SY-21), 54752
Orbit data source: Space-Track
SHIYAN 21 (SY-21), 54752 is a payload satellite owned by CAST (CN) in LEO that was launched on Fri, 16 Dec 2022 UTC via a CHANG ZHENG 11 launch vehicle from the Xichang Space Center, China (XSC). 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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54752 intel report (Beta)
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Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
CAST
Mission
Operational Civil Technology
Bus & Motor
SJ2013, Unknown motor
Mass
100 kg wet, 100 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 1.0 m
Radar Cross Section
0.833 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 weeks ago
TLE from 2 weeks ago
0 SHIYAN 21 (SY-21)
1 54752U 22172A 26160.78821127 .00006507 00000-0 22853-3 0 9999
2 54752 35.9811 117.9945 0020536 188.0233 172.0175 15.28692057194551Epoch: 2026-06-09T18:55Z
TLE epoch observation values (Epoch: 2026-06-09T18:55:01.453Z)
Latitude
0°
Longitude
-63.91724°
Altitude
492.673 km
Speed
7.613 km/s
True Right ascension
07h 51m 58s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
21:24:12
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
496.913 km
Perigee altitude
468.734 km
Semi-major axis
6,860.96 km
Eccentricity
0.00205
Inclination
35.9811°
RAAN
117.9945°
Arg. of periapsis
188.0233°
True anomaly
172.0501°
Mean anomaly
172.0175°
Eccentric anomaly
172.03381°
Mean motion
3.81914 °/min
Orbital period
94.26 mins
BSTAR
0.00022853
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Other satellites on launch #172 in the year 2022 (2022-12-16 UTC)
No other RSOs were in this launch
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.SHIYAN 21 (SY-21) 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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-06-22 19:04:12.169Z | 201.349° SSW | 2026-06-22 19:06:12.169Z | 160.705° S | 20.94° | 2026-06-22 19:09:12.169Z | 107.31° ESE |
| 5 mins | 2026-06-22 20:43:12.169Z | 234.685° WSW | 2026-06-22 20:45:12.169Z | 175.338° S | 34.398° | 2026-06-22 20:48:12.169Z | 105.842° ESE |
| 5 mins | 2026-06-22 22:22:12.169Z | 247.243° WSW | 2026-06-22 22:24:12.169Z | 194.852° SSW | 31.674° | 2026-06-22 22:27:12.169Z | 125.499° SE |
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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