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: 17 hours ago
TLE from 17 hours ago
0 STARLINK-3057
1 49139U 21082K 26071.75107472 .00000120 00000-0 17821-4 0 9994
2 49139 69.9984 246.7220 0002770 270.1982 89.8859 14.98329349247429Epoch: 2026-03-12T18:01Z
TLE epoch observation values (Epoch: 2026-03-12T18:01:32.855Z)
Latitude
-0.0001°
Longitude
165.9386°
Altitude
574.478 km
Speed
7.574 km/s
True Right ascension
16h 26m 53s
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
15:13:24
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
571.931 km
Perigee altitude
568.082 km
Semi-major axis
6,948.143 km
Eccentricity
0.00028
Inclination
69.9984°
RAAN
246.722°
Arg. of periapsis
270.1982°
True anomaly
89.91764°
Mean anomaly
89.8859°
Eccentric anomaly
89.90177°
Mean motion
3.74749 °/min
Orbital period
96.06 mins
BSTAR
0.000017821
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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 | 2026-03-13 13:24:32.210Z | 228.323° WSW | 2026-03-13 13:27:32.210Z | 320.022° NNW | 36.971° | 2026-03-13 13:30:32.210Z | 11.739° NNE |
| 5 mins | 2026-03-13 21:49:32.210Z | 19.313° NNE | 2026-03-13 21:51:32.210Z | 65.89° ENE | 25.05° | 2026-03-13 21:54:32.210Z | 115.857° SE |
| 5 mins | 2026-03-13 23:27:32.210Z | 291.406° WNW | 2026-03-13 23:29:32.210Z | 251.479° W | 21.862° | 2026-03-13 23:32:32.210Z | 202.798° 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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