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, 2.4 m
Radar Cross Section
13.200 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 3 hours ago
TLE from 3 hours ago
0 SHIYAN 27A
1 63599U 25078A 26223.90192227 -.00000002 00000-0 58652-4 0 9994
2 63599 99.6930 230.2960 0000640 90.7631 269.3581 13.57244410 65093Epoch: 2026-08-11T21:38Z
TLE epoch observation values (Epoch: 2026-08-11T21:38:46.084Z)
Latitude
0.00003°
Longitude
-54.75957°
Altitude
1,048.525 km
Speed
7.328 km/s
True Right ascension
15h 21m 11s
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
14:31:20
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,043.49 km
Perigee altitude
1,042.54 km
Semi-major axis
7,421.152 km
Eccentricity
0.00006
Inclination
99.693°
RAAN
230.296°
Arg. of periapsis
90.7631°
True anomaly
269.35077°
Mean anomaly
269.3581°
Eccentric anomaly
269.35443°
Mean motion
3.39497 °/min
Orbital period
106.04 mins
BSTAR
0.000058652
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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 | 2026-08-12 01:16:57.229Z | 200.37° SSW | 2026-08-12 01:21:57.229Z | 254.57° W | 29.296° | 2026-08-12 01:27:57.229Z | 325.942° NNW |
| 9 mins | 2026-08-12 12:25:57.229Z | 47.738° ENE | 2026-08-12 12:29:57.229Z | 99.69° ESE | 26.321° | 2026-08-12 12:34:57.229Z | 153.739° SSE |
| 10 mins | 2026-08-12 14:09:57.229Z | 356.049° N | 2026-08-12 14:13:57.229Z | 304.65° NW | 34.81° | 2026-08-12 14:19:57.229Z | 224.325° SW |
| 4 mins | 2026-08-12 22:37:57.229Z | 70.667° E | 2026-08-12 22:38:57.229Z | 60.514° ENE | 14.042° | 2026-08-12 22:41:57.229Z | 30.716° NE |
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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