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: 6 hours ago
TLE from 6 hours ago
0 STARLINK-2739
1 48639U 21044B 26299.23788823 .00010195 00000-0 29090-3 0 9999
2 48639 53.1589 120.6588 0000749 42.4139 317.6923 15.36661523299151Epoch: 2026-10-26T05:42Z
TLE epoch observation values (Epoch: 2026-10-26T05:42:33.543Z)
Latitude
0.00005°
Longitude
0.40083°
Altitude
456.513 km
Speed
7.64 km/s
True Right ascension
08h 02m 38s
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
07:20:36
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
456.759 km
Perigee altitude
455.735 km
Semi-major axis
6,834.384 km
Eccentricity
0.00007
Inclination
53.1589°
RAAN
120.6588°
Arg. of periapsis
42.4139°
True anomaly
317.68652°
Mean anomaly
317.6923°
Eccentric anomaly
317.68941°
Mean motion
3.84144 °/min
Orbital period
93.71 mins
BSTAR
0.0002909
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-10-26 15:16:34.188Z | 238.344° WSW | 2026-10-26 15:18:34.188Z | 310.271° NW | 74.513° | 2026-10-26 15:21:34.188Z | 45.944° ENE |
| 6 mins | 2026-10-26 21:49:34.188Z | 312.059° NW | 2026-10-26 21:51:34.188Z | 323.487° NNW | 67.322° | 2026-10-26 21:55:34.188Z | 129.062° SE |
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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