STARLINK-2139, 48554
Orbit data source: Space-Track
STARLINK-2139, 48554 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sat, 15 May 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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48554 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
260 kg wet, ~248 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: 3 days ago
TLE from 3 days ago
0 STARLINK-2139
1 48554U 21041B 26170.92987608 .00000074 00000-0 14153-4 0 9998
2 48554 53.1610 11.0627 0001039 89.8188 270.2933 15.31695066280947Epoch: 2026-06-19T22:19Z
TLE epoch observation values (Epoch: 2026-06-19T22:19:01.293Z)
Latitude
0.00003°
Longitude
128.15554°
Altitude
471.652 km
Speed
7.631 km/s
True Right ascension
00h 44m 15s
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
23:19:28
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
471.723 km
Perigee altitude
470.3 km
Semi-major axis
6,849.148 km
Eccentricity
0.0001
Inclination
53.161°
RAAN
11.0627°
Arg. of periapsis
89.8188°
True anomaly
270.28139°
Mean anomaly
270.2933°
Eccentric anomaly
270.28735°
Mean motion
3.82903 °/min
Orbital period
94.02 mins
BSTAR
0.000014153
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Other satellites on launch #41 in the year 2021 (2021-05-15 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-2139 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 14:41:09.196Z | 192.899° SSW | 2026-06-22 14:44:09.196Z | 117.343° SE | 28.453° | 2026-06-22 14:46:09.196Z | 74.348° E |
| 4 mins | 2026-06-22 16:20:09.196Z | 288.793° WNW | 2026-06-22 16:21:09.196Z | 315.637° NNW | 26.501° | 2026-06-22 16:24:09.196Z | 27.68° NE |
| 5 mins | 2026-06-22 21:16:09.196Z | 337.994° N | 2026-06-22 21:18:09.196Z | 30.144° NE | 28.472° | 2026-06-22 21:21:09.196Z | 94.702° ESE |
| 5 mins | 2026-06-22 22:54:09.196Z | 275.604° WNW | 2026-06-22 22:56:09.196Z | 221.009° SW | 26.972° | 2026-06-22 22:59:09.196Z | 165.155° S |
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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