STARLINK-5558, 55631
Orbit data source: Space-Track
STARLINK-5558, 55631 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Fri, 17 Feb 2023 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). 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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55631 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-5558
1 55631U 23021D 26171.45441897 -.00000100 00000-0 -55868-6 0 9998
2 55631 70.0001 305.2554 0003078 270.6655 89.4152 14.98333172183690Epoch: 2026-06-20T10:54Z
TLE epoch observation values (Epoch: 2026-06-20T10:54:21.799Z)
Latitude
0°
Longitude
-127.00423°
Altitude
574.449 km
Speed
7.574 km/s
True Right ascension
20h 21m 01s
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
21:49:07
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
572.133 km
Perigee altitude
567.856 km
Semi-major axis
6,948.131 km
Eccentricity
0.00031
Inclination
70.0001°
RAAN
305.2554°
Arg. of periapsis
270.6655°
True anomaly
89.45047°
Mean anomaly
89.4152°
Eccentric anomaly
89.43283°
Mean motion
3.7475 °/min
Orbital period
96.06 mins
BSTAR
-5.5868e-7
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Other satellites on launch #21 in the year 2023 (2023-02-17 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-5558 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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-06-22 11:09:03.282Z | 263.528° W | 2026-06-22 11:11:03.282Z | 297.072° NW | 19.407° | 2026-06-22 11:14:03.282Z | 348.831° N |
| 6 mins | 2026-06-22 19:33:03.282Z | 342.843° N | 2026-06-22 19:35:03.282Z | 16.083° NNE | 42.726° | 2026-06-22 19:39:03.282Z | 150.089° SSE |
| 6 mins | 2026-06-23 09:33:03.282Z | 176.651° S | 2026-06-23 09:35:03.282Z | 125.985° SE | 37.692° | 2026-06-23 09:39:03.282Z | 35.674° NE |
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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