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: 13 hours ago
TLE from 13 hours ago
0 SHIYAN 27A
1 63599U 25078A 26302.99957873 -.00000024 00000-0 28339-4 0 9990
2 63599 99.6940 308.2220 0001075 79.1064 281.0196 13.57254164 75825Epoch: 2026-10-29T23:59Z
TLE epoch observation values (Epoch: 2026-10-29T23:59:23.602Z)
Latitude
0.00006°
Longitude
-89.9523°
Altitude
1,048.331 km
Speed
7.328 km/s
True Right ascension
20h 32m 53s
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
08:13:18
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,043.777 km
Perigee altitude
1,042.182 km
Semi-major axis
7,421.116 km
Eccentricity
0.00011
Inclination
99.694°
RAAN
308.222°
Arg. of periapsis
79.1064°
True anomaly
281.00751°
Mean anomaly
281.0196°
Eccentric anomaly
281.01355°
Mean motion
3.395 °/min
Orbital period
106.04 mins
BSTAR
0.000028339
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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 | 2026-10-30 12:58:24.203Z | 25.831° NE | 2026-10-30 13:04:24.203Z | 118.296° SE | 53.963° | 2026-10-30 13:09:24.203Z | 176.43° S |
| 8 mins | 2026-10-30 14:44:24.203Z | 341.54° N | 2026-10-30 14:48:24.203Z | 293.751° NW | 25.493° | 2026-10-30 14:52:24.203Z | 250.431° W |
| 8 mins | 2026-10-30 23:09:24.203Z | 103.484° ESE | 2026-10-30 23:12:24.203Z | 68.363° E | 25.727° | 2026-10-30 23:17:24.203Z | 12.205° NNE |
| 10 mins | 2026-10-31 00:52:24.203Z | 187.196° SSW | 2026-10-31 00:57:24.203Z | 271.685° WNW | 53.684° | 2026-10-31 01:02:24.203Z | 333.397° NNW |
| 7 mins | 2026-10-31 12:01:24.203Z | 60.861° ENE | 2026-10-31 12:04:24.203Z | 93.404° ESE | 18.691° | 2026-10-31 12:08:24.203Z | 133.235° 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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