STARLINK-3057, 49139
Orbit data source: Space-Track
STARLINK-3057, 49139 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Tue, 14 Sep 2021 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). 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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49139 intel report (Beta)
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Edit Public Description
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: 10 hours ago
TLE from 10 hours ago
0 STARLINK-3057
1 49139U 21082K 26012.26793442 .00000904 00000-0 83512-4 0 9993
2 49139 70.0002 36.7037 0003101 271.0896 88.9908 14.98337000238517Epoch: 2026-01-12T06:25Z
TLE epoch observation values (Epoch: 2026-01-12T06:25:49.533Z)
Latitude
-0.00003°
Longitude
-171.51977°
Altitude
574.421 km
Speed
7.574 km/s
True Right ascension
02h 26m 48s
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
17:00:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
572.137 km
Perigee altitude
567.828 km
Semi-major axis
6,948.119 km
Eccentricity
0.00031
Inclination
70.0002°
RAAN
36.7037°
Arg. of periapsis
271.0896°
True anomaly
89.02633°
Mean anomaly
88.9908°
Eccentric anomaly
89.00856°
Mean motion
3.74751 °/min
Orbital period
96.06 mins
BSTAR
0.000083512
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Other satellites on launch #82 in the year 2021 (2021-09-14 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-3057 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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-01-13 01:47:25.005Z | 137.806° SSE | 2026-01-13 01:49:25.005Z | 108.91° ESE | 14.563° | 2026-01-13 01:51:25.005Z | 76.951° E |
| 6 mins | 2026-01-13 03:25:25.005Z | 238.496° WSW | 2026-01-13 03:27:25.005Z | 286.926° WNW | 33.897° | 2026-01-13 03:31:25.005Z | 9.902° NNE |
| 6 mins | 2026-01-13 11:49:25.005Z | 6.025° NNE | 2026-01-13 11:51:25.005Z | 46.391° ENE | 27.959° | 2026-01-13 11:55:25.005Z | 123.092° SE |
| 4 mins | 2026-01-13 13:28:25.005Z | 283.265° WNW | 2026-01-13 13:29:25.005Z | 265.305° W | 18.583° | 2026-01-13 13:32:25.005Z | 213.829° SW |
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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