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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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: 18 hours ago
TLE from 18 hours ago
0 STARLINK-3057
1 49139U 21082K 26125.35933041 .00000062 00000-0 13008-4 0 9997
2 49139 69.9987 111.5610 0003092 269.4529 90.6276 14.98328168255453Epoch: 2026-05-05T08:37Z
TLE epoch observation values (Epoch: 2026-05-05T08:37:26.147Z)
Latitude
0°
Longitude
118.96675°
Altitude
574.51 km
Speed
7.574 km/s
True Right ascension
07h 26m 14s
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
10:39:52
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
572.158 km
Perigee altitude
567.862 km
Semi-major axis
6,948.147 km
Eccentricity
0.00031
Inclination
69.9987°
RAAN
111.561°
Arg. of periapsis
269.4529°
True anomaly
90.66303°
Mean anomaly
90.6276°
Eccentric anomaly
90.64531°
Mean motion
3.74748 °/min
Orbital period
96.06 mins
BSTAR
0.000013008
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-05-06 09:11:26.291Z | 2.796° NNE | 2026-05-06 09:14:26.291Z | 51.074° ENE | 22.481° | 2026-05-06 09:17:26.291Z | 106.248° ESE |
| 6 mins | 2026-05-06 10:50:26.291Z | 302.432° NW | 2026-05-06 10:53:26.291Z | 240.575° WSW | 24.317° | 2026-05-06 10:56:26.291Z | 195.248° SSW |
| 6 mins | 2026-05-07 00:50:26.291Z | 238.36° WSW | 2026-05-07 00:53:26.291Z | 315.856° NNW | 31.941° | 2026-05-07 00:56:26.291Z | 6.947° NNE |
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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