STARLINK-4129, 53251
Orbit data source: Space-Track
STARLINK-4129, 53251 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sun, 24 Jul 2022 UTC via an FALCON 9 launch vehicle from the Air Force Eastern Test Range (AFETR). 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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53251 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational Commercial Communications
Bus & Motor
STARLINK, Unknown motor
Mass
297 kg wet, ~275 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 1 Pan, 10.1 m
Radar Cross Section
13.562 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 STARLINK-4129
1 53251U 22086K 26171.41668980 .00002203 00000-0 13868-3 0 9999
2 53251 53.1597 92.8018 0002067 78.6451 176.0513 15.13396582 5777Epoch: 2026-06-20T10:00Z
TLE epoch observation values (Epoch: 2026-06-20T10:00:01.998Z)
Latitude
-50.69413°
Longitude
-80.31493°
Altitude
544.808 km
Speed
7.589 km/s
True Right ascension
22h 33m 18s
True Declination
-50° 31' 13"
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
21:30:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
527.532 km
Perigee altitude
524.678 km
Semi-major axis
6,904.242 km
Eccentricity
0.00021
Inclination
53.1597°
RAAN
92.8018°
Arg. of periapsis
78.6451°
True anomaly
176.05293°
Mean anomaly
176.0513°
Eccentric anomaly
176.05212°
Mean motion
3.78329 °/min
Orbital period
95.16 mins
BSTAR
0.00013868
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Other satellites on launch #86 in the year 2022 (2022-07-24 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.STARLINK-4129 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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-06-22 19:40:15.013Z | 169.826° S | 2026-06-22 19:43:15.013Z | 117.933° SE | 17.436° | 2026-06-22 19:45:15.013Z | 86.002° E |
| 6 mins | 2026-06-22 21:19:15.013Z | 251.921° W | 2026-06-22 21:21:15.013Z | 307.092° NW | 39.691° | 2026-06-22 21:25:15.013Z | 43.077° NE |
| 4 mins | 2026-06-23 02:20:15.013Z | 351.695° N | 2026-06-23 02:22:15.013Z | 38.02° NE | 22.196° | 2026-06-23 02:24:15.013Z | 74.2° E |
| 6 mins | 2026-06-23 03:58:15.013Z | 300.177° NW | 2026-06-23 04:01:15.013Z | 206.898° SW | 40.817° | 2026-06-23 04:04:15.013Z | 145.659° SSE |
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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