STARLINK-3129, 49453
Orbit data source: Space-Track
STARLINK-3129, 49453 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sat, 13 Nov 2021 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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49453 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
290 kg wet, ~270 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: 1 week ago
TLE from 1 week ago
0 STARLINK-3129
1 49453U 21104AX 26154.72654495 -.00001058 00000-0 -48401-4 0 9990
2 49453 53.1808 192.9444 0001453 108.0988 252.0162 15.08839974251765Epoch: 2026-06-03T17:26Z
TLE epoch observation values (Epoch: 2026-06-03T17:26:13.483Z)
Latitude
-0.00003°
Longitude
39.20717°
Altitude
540.948 km
Speed
7.593 km/s
True Right ascension
12h 51m 46s
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
14:52:00
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.999 km
Perigee altitude
538.989 km
Semi-major axis
6,918.131 km
Eccentricity
0.00015
Inclination
53.1808°
RAAN
192.9444°
Arg. of periapsis
108.0988°
True anomaly
252.00036°
Mean anomaly
252.0162°
Eccentric anomaly
252.00828°
Mean motion
3.7719 °/min
Orbital period
95.44 mins
BSTAR
-0.000048401
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Other satellites on launch #104 in the year 2021 (2021-11-13 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-3129 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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-06-11 08:44:19.883Z | 332.722° NNW | 2026-06-11 08:47:19.883Z | 46.37° ENE | 29.379° | 2026-06-11 08:50:19.883Z | 96.715° ESE |
| 5 mins | 2026-06-11 10:24:19.883Z | 276.7° WNW | 2026-06-11 10:26:19.883Z | 223.649° SW | 29.649° | 2026-06-11 10:29:19.883Z | 165.759° S |
| 5 mins | 2026-06-12 01:55:19.883Z | 192.219° SSW | 2026-06-12 01:57:19.883Z | 141.383° SSE | 33.493° | 2026-06-12 02:00:19.883Z | 68.595° E |
| 6 mins | 2026-06-12 03:34:19.883Z | 275.406° WNW | 2026-06-12 03:37:19.883Z | 343.02° N | 27.064° | 2026-06-12 03:40:19.883Z | 33.137° NE |
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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