STARLINK-5739, 55571
Orbit data source: Space-Track
STARLINK-5739, 55571 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sun, 12 Feb 2023 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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55571 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational spacecraft
Bus & Motor
STARLINK, Unknown motor
Mass
305 kg wet, ~290 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown shape, 10.1 m
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 15 hours ago
TLE from 15 hours ago
0 STARLINK-5739
1 55571U 23020C 25340.54141045 .00003108 00000-0 24491-3 0 9993
2 55571 43.0024 151.1021 0001399 272.8431 87.2251 15.02553753154908Epoch: 2025-12-06T12:59Z
TLE epoch observation values (Epoch: 2025-12-06T12:59:37.862Z)
Latitude
-0.00005°
Longitude
-119.37338°
Altitude
558.756 km
Speed
7.584 km/s
True Right ascension
10h 04m 24s
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
02:04:57
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
561.919 km
Perigee altitude
559.978 km
Semi-major axis
6,939.085 km
Eccentricity
0.00014
Inclination
43.0024°
RAAN
151.1021°
Arg. of periapsis
272.8431°
True anomaly
87.24111°
Mean anomaly
87.2251°
Eccentric anomaly
87.23311°
Mean motion
3.75483 °/min
Orbital period
95.88 mins
BSTAR
0.00024491
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Other satellites on launch #20 in the year 2023 (2023-02-12 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-5739 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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-12-07 14:43:41.369Z | 219.879° SW | 2025-12-07 14:46:41.369Z | 163.093° S | 34.543° | 2025-12-07 14:50:41.369Z | 80.365° E |
| 7 mins | 2025-12-07 16:24:41.369Z | 268.343° W | 2025-12-07 16:27:41.369Z | 1.83° NNE | 42.536° | 2025-12-07 16:31:41.369Z | 71.716° E |
| 6 mins | 2025-12-07 18:05:41.369Z | 291.303° WNW | 2025-12-07 18:08:41.369Z | 19.23° NNE | 40.333° | 2025-12-07 18:11:41.369Z | 83.685° E |
| 6 mins | 2025-12-07 19:46:41.369Z | 280.238° WNW | 2025-12-07 19:49:41.369Z | 170.308° S | 40.667° | 2025-12-07 19:52:41.369Z | 124.95° SE |
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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