SHIYAN 27A, 63599
Orbit data source: Space-Track
SHIYAN 27A, 63599 is a payload satellite owned by CAST (CN) in SSO that was launched on Fri, 18 Apr 2025 UTC via a CHANG ZHENG 6A launch vehicle from the Taiyaun Space Center, China (TSC). 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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63599 intel report (Beta)
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Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
CAST
Mission
Operational Defense Radar Imaging
Bus & Motor
SW27, Unknown motor
Mass
300 kg wet, ~300 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 1 Pan, 5.0 m
Radar Cross Section
13.200 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 7 hours ago
TLE from 7 hours ago
0 SHIYAN 27A
1 63599U 25078A 26269.60615668 .00000004 00000-0 67099-4 0 9996
2 63599 99.6943 275.3249 0001091 101.4779 258.6482 13.57251147 71296Epoch: 2026-09-26T14:32Z
TLE epoch observation values (Epoch: 2026-09-26T14:32:51.937Z)
Latitude
0.00001°
Longitude
51.69668°
Altitude
1,048.654 km
Speed
7.327 km/s
True Right ascension
18h 21m 17s
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
14:36:39
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,043.8 km
Perigee altitude
1,042.181 km
Semi-major axis
7,421.127 km
Eccentricity
0.00011
Inclination
99.6943°
RAAN
275.3249°
Arg. of periapsis
101.4779°
True anomaly
258.63594°
Mean anomaly
258.6482°
Eccentric anomaly
258.64207°
Mean motion
3.39499 °/min
Orbital period
106.04 mins
BSTAR
0.000067099
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Other satellites on launch #78 in the year 2025 (2025-04-18 UTC)
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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 27A 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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-09-26 23:31:23.281Z | 128.248° SE | 2026-09-26 23:36:23.281Z | 68.716° E | 38.215° | 2026-09-26 23:42:23.281Z | 0.736° NNE |
| 10 mins | 2026-09-27 01:16:23.281Z | 203.578° SW | 2026-09-27 01:21:23.281Z | 268.622° W | 35.19° | 2026-09-27 01:26:23.281Z | 325.062° NNW |
| 9 mins | 2026-09-27 12:24:23.281Z | 45.826° ENE | 2026-09-27 12:28:23.281Z | 94.689° ESE | 29.198° | 2026-09-27 12:33:23.281Z | 151.406° SSE |
| 10 mins | 2026-09-27 14:08:23.281Z | 357.848° N | 2026-09-27 14:13:23.281Z | 286.666° WNW | 45.557° | 2026-09-27 14:18:23.281Z | 224.814° SW |
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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