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.
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
63599 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
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: 8 hours ago
TLE from 8 hours ago
0 SHIYAN 27A
1 63599U 25078A 25256.95372204 -.00000002 00000-0 59294-4 0 9992
2 63599 99.6939 263.3319 0000864 76.0075 284.1159 13.57212670 20061Epoch: 2025-09-13T22:53Z
TLE epoch observation values (Epoch: 2025-09-13T22:53:21.584Z)
Latitude
-0.00005°
Longitude
-73.18771°
Altitude
1,048.478 km
Speed
7.328 km/s
True Right ascension
17h 33m 19s
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
23:17:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,043.772 km
Perigee altitude
1,042.489 km
Semi-major axis
7,421.268 km
Eccentricity
0.00009
Inclination
99.6939°
RAAN
263.3319°
Arg. of periapsis
76.0075°
True anomaly
284.1063°
Mean anomaly
284.1159°
Eccentric anomaly
284.1111°
Mean motion
3.39489 °/min
Orbital period
106.04 mins
BSTAR
0.000059294
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #78 in the year 2025 (2025-04-18 UTC)
Did you know?
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
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2025-09-14 11:55:19.703Z | 60.836° ENE | 2025-09-14 11:58:19.703Z | 91.218° ESE | 15.559° | 2025-09-14 12:01:19.703Z | 121.449° SE |
| 11 mins | 2025-09-14 13:38:19.703Z | 10.808° NNE | 2025-09-14 13:43:19.703Z | 305.708° NW | 44.225° | 2025-09-14 13:49:19.703Z | 203.049° SW |
| 4 mins | 2025-09-14 15:25:19.703Z | 322.21° NNW | 2025-09-14 15:27:19.703Z | 302.593° NW | 12.873° | 2025-09-14 15:29:19.703Z | 283.533° WNW |
| 10 mins | 2025-09-14 23:47:19.703Z | 136.271° SSE | 2025-09-14 23:52:19.703Z | 62.168° ENE | 36.977° | 2025-09-14 23:57:19.703Z | 359.032° N |
| 8 mins | 2025-09-15 01:33:19.703Z | 220.638° SW | 2025-09-15 01:37:19.703Z | 271.291° WNW | 24.262° | 2025-09-15 01:41:19.703Z | 315.584° NNW |
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 ascending order |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in ascending order |
|---|