SJ-28, 66549
Orbit data source: Space-Track
SJ-28, 66549 is a payload satellite owned by PLA SSF (CN) in GEO that was launched on Sun, 30 Nov 2025 UTC via a CHANG ZHENG 7A launch vehicle from the Wenchang Satellite Launch Center (WSC). 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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66549 intel report (Beta)
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Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
CAST
Mission
Operational Civil Technology
Bus & Motor
SJ28, LAE
Mass
~5,000 kg wet, ~2,500 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 1.1 m
Radar Cross Section
34.063 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 SJ-28
1 66549U 25277A 26171.47940817 -.00000364 00000-0 00000+0 0 9993
2 66549 4.5287 272.0817 0001125 39.3140 246.6563 1.00276035 2181Epoch: 2026-06-20T11:30Z
TLE epoch observation values (Epoch: 2026-06-20T11:30:20.865Z)
Latitude
-4.36742°
Longitude
116.81142°
Altitude
35,787.452 km
Speed
3.075 km/s
True Right ascension
13h 12m 22s
True Declination
-4° 21' 47"
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
07:12:42
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
35,791.208 km
Perigee altitude
35,781.721 km
Semi-major axis
42,164.601 km
Eccentricity
0.00011
Inclination
4.5287°
RAAN
272.0817°
Arg. of periapsis
39.314°
True anomaly
246.64446°
Mean anomaly
246.6563°
Eccentric anomaly
246.65038°
Mean motion
0.25068 °/min
Orbital period
1,436.09 mins
BSTAR
0
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Other satellites on launch #277 in the year 2025 (2025-11-30 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.SJ-28 Visibility
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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. |
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| SJ-28 is likely not visible in the next few days. |
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66549 neighbors
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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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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 descending order |
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