STARLINK-2739, 48639
Orbit data source: Space-Track
STARLINK-2739, 48639 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 26 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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48639 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: 2 days ago
TLE from 2 days ago
0 STARLINK-2739
1 48639U 21044B 26171.43049316 .00014405 00000-0 47495-3 0 9994
2 48639 53.1604 355.8729 0000914 75.1822 284.9280 15.31706990279562Epoch: 2026-06-20T10:19Z
TLE epoch observation values (Epoch: 2026-06-20T10:19:54.609Z)
Latitude
-0.00005°
Longitude
-67.7499°
Altitude
471.458 km
Speed
7.632 km/s
True Right ascension
23h 43m 29s
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
21:34:23
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
471.602 km
Perigee altitude
470.35 km
Semi-major axis
6,849.113 km
Eccentricity
0.00009
Inclination
53.1604°
RAAN
355.8729°
Arg. of periapsis
75.1822°
True anomaly
284.91788°
Mean anomaly
284.928°
Eccentric anomaly
284.92294°
Mean motion
3.82906 °/min
Orbital period
94.02 mins
BSTAR
0.00047495
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Other satellites on launch #44 in the year 2021 (2021-05-26 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-2739 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 | 2026-06-22 14:10:22.269Z | 212.782° SW | 2026-06-22 14:13:22.269Z | 152.474° SSE | 38.891° | 2026-06-22 14:16:22.269Z | 60.991° ENE |
| 4 mins | 2026-06-22 15:50:22.269Z | 303.392° NW | 2026-06-22 15:51:22.269Z | 327.225° NNW | 21.385° | 2026-06-22 15:54:22.269Z | 26.34° NE |
| 5 mins | 2026-06-22 20:46:22.269Z | 333.028° NNW | 2026-06-22 20:48:22.269Z | 47.292° ENE | 35.913° | 2026-06-22 20:51:22.269Z | 109.129° ESE |
| 4 mins | 2026-06-22 22:24:22.269Z | 260.123° W | 2026-06-22 22:25:22.269Z | 239.222° WSW | 18.499° | 2026-06-22 22:28:22.269Z | 183.46° SSW |
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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