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, 5.0 m
Radar Cross Section
13.200 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 20 hours ago
TLE from 20 hours ago
0 SHIYAN 27A
1 63599U 25078A 25256.29025705 -.00000004 00000-0 55909-4 0 9991
2 63599 99.6939 262.6783 0000874 75.7223 284.4012 13.57212597 19977Epoch: 2025-09-13T06:57Z
TLE epoch observation values (Epoch: 2025-09-13T06:57:58.209Z)
Latitude
-0.00004°
Longitude
165.66003°
Altitude
1,048.474 km
Speed
7.328 km/s
True Right ascension
17h 30m 42s
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
19:03:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,043.78 km
Perigee altitude
1,042.482 km
Semi-major axis
7,421.268 km
Eccentricity
0.00009
Inclination
99.6939°
RAAN
262.6783°
Arg. of periapsis
75.7223°
True anomaly
284.3915°
Mean anomaly
284.4012°
Eccentric anomaly
284.39635°
Mean motion
3.39489 °/min
Orbital period
106.04 mins
BSTAR
0.000055909
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-09-14 11:54:37.242Z | 55.044° ENE | 2025-09-14 11:58:37.242Z | 94.429° ESE | 15.511° | 2025-09-14 12:01:37.242Z | 123.89° SE |
| 11 mins | 2025-09-14 13:38:37.242Z | 10.513° NNE | 2025-09-14 13:43:37.242Z | 274.558° WNW | 44.266° | 2025-09-14 13:49:37.242Z | 202.829° SW |
| 4 mins | 2025-09-14 15:25:37.242Z | 319.47° NNW | 2025-09-14 15:26:37.242Z | 309.692° NW | 12.826° | 2025-09-14 15:29:37.242Z | 281.016° WNW |
| 10 mins | 2025-09-14 23:47:37.242Z | 134.988° SE | 2025-09-14 23:51:37.242Z | 82.737° E | 36.632° | 2025-09-14 23:57:37.242Z | 358.051° N |
| 8 mins | 2025-09-15 01:33:37.242Z | 223.18° SW | 2025-09-15 01:36:37.242Z | 260.547° W | 24.339° | 2025-09-15 01:41:37.242Z | 317.523° NNW |
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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