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: 2 days ago
TLE from 2 days ago
0 STARLINK-3057
1 49139U 21082K 26171.41668980 .00093459 00000-0 54490-2 0 9992
2 49139 70.0004 354.8008 0004451 251.9418 284.9835 15.11448988 5789Epoch: 2026-06-20T10:00Z
TLE epoch observation values (Epoch: 2026-06-20T10:00:01.998Z)
Latitude
2.84397°
Longitude
115.13054°
Altitude
533.1 km
Speed
7.597 km/s
True Right ascension
11h 35m 04s
True Declination
2° 49' 35"
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
21:49:43
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
532.791 km
Perigee altitude
526.642 km
Semi-major axis
6,907.853 km
Eccentricity
0.00045
Inclination
70.0004°
RAAN
354.8008°
Arg. of periapsis
251.9418°
True anomaly
284.93422°
Mean anomaly
284.9835°
Eccentric anomaly
284.95886°
Mean motion
3.78032 °/min
Orbital period
95.23 mins
BSTAR
0.005449
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-06-22 13:47:39.691Z | 237.1° WSW | 2026-06-22 13:49:39.691Z | 299.605° NW | 35.731° | 2026-06-22 13:52:39.691Z | 8.363° NNE |
| 4 mins | 2026-06-22 22:07:39.691Z | 24.01° NE | 2026-06-22 22:08:39.691Z | 45.812° ENE | 22.54° | 2026-06-22 22:11:39.691Z | 107.138° ESE |
| 4 mins | 2026-06-22 23:44:39.691Z | 291.214° WNW | 2026-06-22 23:46:39.691Z | 248.182° W | 21.761° | 2026-06-22 23:48:39.691Z | 209.985° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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