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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Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational Commercial Communications
Bus & Motor
STARLINK, Unknown motor
Mass
305 kg wet, ~290 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-5739
1 55571U 23020C 26061.63024995 .00000598 00000-0 59348-4 0 9998
2 55571 43.0059 43.3207 0001254 272.2732 87.7967 15.02533544167855Epoch: 2026-03-02T15:07Z
TLE epoch observation values (Epoch: 2026-03-02T15:07:33.595Z)
Latitude
-0.00001°
Longitude
16.0098°
Altitude
558.832 km
Speed
7.584 km/s
True Right ascension
02h 53m 16s
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
11:22:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
561.88 km
Perigee altitude
560.14 km
Semi-major axis
6,939.147 km
Eccentricity
0.00013
Inclination
43.0059°
RAAN
43.3207°
Arg. of periapsis
272.2732°
True anomaly
87.81106°
Mean anomaly
87.7967°
Eccentric anomaly
87.80388°
Mean motion
3.75478 °/min
Orbital period
95.88 mins
BSTAR
0.000059348
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-03-04 00:49:20.239Z | 174.992° S | 2026-03-04 00:51:20.239Z | 138.389° SSE | 18.799° | 2026-03-04 00:53:20.239Z | 104.819° ESE |
| 7 mins | 2026-03-04 02:28:20.239Z | 242.583° WSW | 2026-03-04 02:31:20.239Z | 163.243° S | 44.267° | 2026-03-04 02:35:20.239Z | 73.33° E |
| 6 mins | 2026-03-04 04:09:20.239Z | 282.354° WNW | 2026-03-04 04:12:20.239Z | 6.599° NNE | 39.567° | 2026-03-04 04:15:20.239Z | 71.995° E |
| 6 mins | 2026-03-04 05:50:20.239Z | 291.162° WNW | 2026-03-04 05:53:20.239Z | 46.748° ENE | 43.635° | 2026-03-04 05:56:20.239Z | 99.157° ESE |
| 6 mins | 2026-03-04 07:31:20.239Z | 264.637° W | 2026-03-04 07:33:20.239Z | 221.013° SW | 29.657° | 2026-03-04 07:37:20.239Z | 145.889° SSE |
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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