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: 2 days ago
TLE from 2 days ago
0 STARLINK-5739
1 55571U 23020C 26171.22028299 -.00000188 00000-0 27049-5 0 9996
2 55571 43.0003 149.5621 0001205 259.1060 100.9656 15.27572181184553Epoch: 2026-06-20T05:17Z
TLE epoch observation values (Epoch: 2026-06-20T05:17:12.450Z)
Latitude
-0.00002°
Longitude
161.82217°
Altitude
483.005 km
Speed
7.626 km/s
True Right ascension
09h 58m 14s
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
21:40:43
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
485.845 km
Perigee altitude
484.191 km
Semi-major axis
6,863.155 km
Eccentricity
0.00012
Inclination
43.0003°
RAAN
149.5621°
Arg. of periapsis
259.106°
True anomaly
100.97916°
Mean anomaly
100.9656°
Eccentric anomaly
100.97238°
Mean motion
3.81731 °/min
Orbital period
94.31 mins
BSTAR
0.0000027049
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-06-23 00:58:40.367Z | 215.827° SW | 2026-06-23 01:01:40.367Z | 137.063° SSE | 32.063° | 2026-06-23 01:04:40.367Z | 82.316° E |
| 6 mins | 2026-06-23 02:37:40.367Z | 268.585° W | 2026-06-23 02:40:40.367Z | 29.78° NE | 40.353° | 2026-06-23 02:43:40.367Z | 70.276° E |
| 5 mins | 2026-06-23 04:17:40.367Z | 299.458° NW | 2026-06-23 04:19:40.367Z | 22.923° NE | 38.645° | 2026-06-23 04:22:40.367Z | 83.102° E |
| 5 mins | 2026-06-23 05:56:40.367Z | 277.486° WNW | 2026-06-23 05:58:40.367Z | 181.409° SSW | 41.896° | 2026-06-23 06:01:40.367Z | 122.51° 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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