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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Edit Public Description
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: 21 hours ago
TLE from 21 hours ago
0 STARLINK-5581
1 55373U 23013AU 25348.90545112 .00001523 00000-0 12781-3 0 9994
2 55373 43.0054 54.1805 0001683 272.6550 87.4099 15.02527330158806Epoch: 2025-12-14T21:43Z
TLE epoch observation values (Epoch: 2025-12-14T21:43:50.976Z)
Latitude
-0.00008°
Longitude
4.40635°
Altitude
558.832 km
Speed
7.584 km/s
True Right ascension
03h 36m 43s
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
17:04:31
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
562.197 km
Perigee altitude
559.861 km
Semi-major axis
6,939.166 km
Eccentricity
0.00017
Inclination
43.0054°
RAAN
54.1805°
Arg. of periapsis
272.655°
True anomaly
87.42917°
Mean anomaly
87.4099°
Eccentric anomaly
87.41953°
Mean motion
3.75476 °/min
Orbital period
95.88 mins
BSTAR
0.00012781
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-12-16 07:26:21.073Z | 214.633° SW | 2025-12-16 07:29:21.073Z | 154.857° SSE | 32.394° | 2025-12-16 07:33:21.073Z | 81.11° E |
| 6 mins | 2025-12-16 09:07:21.073Z | 265.789° W | 2025-12-16 09:10:21.073Z | 22.006° NNE | 42.589° | 2025-12-16 09:13:21.073Z | 69.793° E |
| 6 mins | 2025-12-16 10:48:21.073Z | 291.802° WNW | 2025-12-16 10:51:21.073Z | 29.26° NE | 39.247° | 2025-12-16 10:54:21.073Z | 82.286° E |
| 6 mins | 2025-12-16 12:29:21.073Z | 281.865° WNW | 2025-12-16 12:31:21.073Z | 245.652° WSW | 41.935° | 2025-12-16 12:35:21.073Z | 120.581° SE |
| 4 mins | 2025-12-16 14:10:21.073Z | 245.802° WSW | 2025-12-16 14:12:21.073Z | 211.213° SW | 16.672° | 2025-12-16 14:14:21.073Z | 180.579° SSW |
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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