STARLINK-5581, 55373
Orbit data source: Space-Track
STARLINK-5581, 55373 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Thu, 26 Jan 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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55373 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-5581
1 55373U 23013AU 26171.17882017 -.00000086 00000-0 64010-5 0 9994
2 55373 43.0014 103.0517 0000759 257.3988 102.6779 15.27575637187137Epoch: 2026-06-20T04:17Z
TLE epoch observation values (Epoch: 2026-06-20T04:17:30.062Z)
Latitude
-0.00001°
Longitude
130.27926°
Altitude
482.952 km
Speed
7.626 km/s
True Right ascension
06h 52m 12s
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
21:52:38
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
485.528 km
Perigee altitude
484.486 km
Semi-major axis
6,863.144 km
Eccentricity
0.00008
Inclination
43.0014°
RAAN
103.0517°
Arg. of periapsis
257.3988°
True anomaly
102.68639°
Mean anomaly
102.6779°
Eccentric anomaly
102.68214°
Mean motion
3.81732 °/min
Orbital period
94.31 mins
BSTAR
0.000006401
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Other satellites on launch #13 in the year 2023 (2023-01-26 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-5581 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 22:26:33.546Z | 232.51° WSW | 2026-06-22 22:28:33.546Z | 187.811° SSW | 40.543° | 2026-06-22 22:32:33.546Z | 75.429° E |
| 6 mins | 2026-06-23 00:05:33.546Z | 280.875° WNW | 2026-06-23 00:07:33.546Z | 327.686° NNW | 38.221° | 2026-06-23 00:11:33.546Z | 72.462° E |
| 6 mins | 2026-06-23 01:44:33.546Z | 292.783° NW | 2026-06-23 01:47:33.546Z | 49.257° ENE | 40.342° | 2026-06-23 01:50:33.546Z | 93.334° ESE |
| 6 mins | 2026-06-23 03:23:33.546Z | 272.356° WNW | 2026-06-23 03:25:33.546Z | 229.749° WSW | 32.39° | 2026-06-23 03:29:33.546Z | 137.115° SSE |
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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