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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Edit Public Description
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: 11 hours ago
TLE from 11 hours ago
0 SHIYAN 27A
1 63599U 25078A 26032.97567441 .00000010 00000-0 75766-4 0 9996
2 63599 99.6931 42.2225 0000671 82.1154 278.0060 13.57235565 39190Epoch: 2026-02-01T23:24Z
TLE epoch observation values (Epoch: 2026-02-01T23:24:58.269Z)
Latitude
-0.00004°
Longitude
-81.19788°
Altitude
1,048.482 km
Speed
7.328 km/s
True Right ascension
02h 48m 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
12:33:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,043.545 km
Perigee altitude
1,042.549 km
Semi-major axis
7,421.184 km
Eccentricity
0.00007
Inclination
99.6931°
RAAN
42.2225°
Arg. of periapsis
82.1154°
True anomaly
277.99839°
Mean anomaly
278.006°
Eccentric anomaly
278.00219°
Mean motion
3.39495 °/min
Orbital period
106.04 mins
BSTAR
0.000075766
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-02-02 12:24:55.968Z | 40.32° NE | 2026-02-02 12:29:55.968Z | 98.308° ESE | 26.204° | 2026-02-02 12:34:55.968Z | 153.076° SSE |
| 10 mins | 2026-02-02 14:09:55.968Z | 356.611° N | 2026-02-02 14:14:55.968Z | 281.183° WNW | 35.004° | 2026-02-02 14:19:55.968Z | 224.4° SW |
| 4 mins | 2026-02-02 22:37:55.968Z | 71.462° E | 2026-02-02 22:39:55.968Z | 50.984° ENE | 13.961° | 2026-02-02 22:41:55.968Z | 31.529° NE |
| 11 mins | 2026-02-03 00:17:55.968Z | 159.978° S | 2026-02-03 00:22:55.968Z | 109.916° ESE | 44.735° | 2026-02-03 00:28:55.968Z | 346.951° N |
| 4 mins | 2026-02-03 02:06:55.968Z | 254.815° W | 2026-02-03 02:07:55.968Z | 264.99° W | 14.013° | 2026-02-03 02:10:55.968Z | 294.941° NW |
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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