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: 5 hours ago
TLE from 5 hours ago
0 SHIYAN 27A
1 63599U 25078A 26089.59025337 .00000011 00000-0 77121-4 0 9997
2 63599 99.6932 97.9925 0000893 104.5670 255.5567 13.57242677 46870Epoch: 2026-03-30T14:09Z
TLE epoch observation values (Epoch: 2026-03-30T14:09:57.891Z)
Latitude
-0.00005°
Longitude
57.52169°
Altitude
1,048.691 km
Speed
7.327 km/s
True Right ascension
06h 31m 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
00:14:52
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,043.684 km
Perigee altitude
1,042.358 km
Semi-major axis
7,421.158 km
Eccentricity
0.00009
Inclination
99.6932°
RAAN
97.9925°
Arg. of periapsis
104.567°
True anomaly
255.54679°
Mean anomaly
255.5567°
Eccentric anomaly
255.55175°
Mean motion
3.39497 °/min
Orbital period
106.04 mins
BSTAR
0.000077121
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-03-30 23:09:41.207Z | 111.956° ESE | 2026-03-30 23:14:41.207Z | 54.99° ENE | 23.694° | 2026-03-30 23:18:41.207Z | 12.492° NNE |
| 10 mins | 2026-03-31 00:53:41.207Z | 187.514° SSW | 2026-03-31 00:58:41.207Z | 268.177° W | 38.605° | 2026-03-31 01:03:41.207Z | 332.694° NNW |
| 7 mins | 2026-03-31 12:02:41.207Z | 60.142° ENE | 2026-03-31 12:05:41.207Z | 92.765° ESE | 17.966° | 2026-03-31 12:09:41.207Z | 133.166° SE |
| 11 mins | 2026-03-31 13:45:41.207Z | 7.384° NNE | 2026-03-31 13:50:41.207Z | 290.182° WNW | 42.814° | 2026-03-31 13:56:41.207Z | 207.964° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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