YUNHAI 1, 41857
Orbit data source: Space-Track
YUNHAI 1, 41857 is a payload satellite owned by SAST (CN) in SSO that was launched on Fri, 11 Nov 2016 UTC via a CHANG ZHENG 2D launch vehicle from the Jiuquan Satellite Launch Center, China (JSC). 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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41857 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
SAST
Mission
Operational Defense Weather
Bus & Motor
YUNHAI-1, Unknown motor
Mass
~800 kg wet, ~800 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 2.0 m
Radar Cross Section
5.141 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 6 hours ago
TLE from 6 hours ago
0 YUNHAI 1
1 41857U 16068A 25258.62226613 .00000315 00000-0 13265-3 0 9995
2 41857 98.5919 267.1176 0007491 114.5492 245.6473 14.32458525462513Epoch: 2025-09-15T14:56Z
TLE epoch observation values (Epoch: 2025-09-15T14:56:03.793Z)
Latitude
-0.00006°
Longitude
48.27753°
Altitude
788.676 km
Speed
7.458 km/s
True Right ascension
17h 48m 28s
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
13:57:45
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
786.024 km
Perigee altitude
775.298 km
Semi-major axis
7,158.798 km
Eccentricity
0.00075
Inclination
98.5919°
RAAN
267.1176°
Arg. of periapsis
114.5492°
True anomaly
245.56913°
Mean anomaly
245.6473°
Eccentric anomaly
245.60821°
Mean motion
3.5833 °/min
Orbital period
100.47 mins
BSTAR
0.00013265
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Other satellites on launch #68 in the year 2016 (2016-11-11 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.YUNHAI 1 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 | 2025-09-15 23:27:53.254Z | 110.84° ESE | 2025-09-15 23:31:53.254Z | 58.254° ENE | 19.69° | 2025-09-15 23:34:53.254Z | 20.069° NNE |
| 8 mins | 2025-09-16 01:06:53.254Z | 192.963° SSW | 2025-09-16 01:10:53.254Z | 274.082° WNW | 35.621° | 2025-09-16 01:14:53.254Z | 332.011° NNW |
| 8 mins | 2025-09-16 13:18:53.254Z | 22.864° NE | 2025-09-16 13:22:53.254Z | 109.996° ESE | 41.897° | 2025-09-16 13:26:53.254Z | 181.159° SSW |
| 4 mins | 2025-09-16 14:59:53.254Z | 320.257° NNW | 2025-09-16 15:01:53.254Z | 293.559° NW | 15.286° | 2025-09-16 15:03:53.254Z | 268.517° W |
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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