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: 7 hours ago
TLE from 7 hours ago
0 STARLINK-5558
1 55631U 23021D 26091.40921439 -.00000126 00000-0 -27638-5 0 9990
2 55631 69.9991 147.0818 0003330 268.2076 91.8701 14.98328722171702Epoch: 2026-04-01T09:49Z
TLE epoch observation values (Epoch: 2026-04-01T09:49:16.123Z)
Latitude
-0.00008°
Longitude
169.99213°
Altitude
574.56 km
Speed
7.574 km/s
True Right ascension
09h 48m 19s
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
22:57:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
572.322 km
Perigee altitude
567.694 km
Semi-major axis
6,948.145 km
Eccentricity
0.00033
Inclination
69.9991°
RAAN
147.0818°
Arg. of periapsis
268.2076°
True anomaly
91.90824°
Mean anomaly
91.8701°
Eccentric anomaly
91.88917°
Mean motion
3.74748 °/min
Orbital period
96.06 mins
BSTAR
-0.0000027638
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-04-02 05:10:36.328Z | 207.701° SW | 2026-04-02 05:14:36.328Z | 324.113° NNW | 44.304° | 2026-04-02 05:18:36.328Z | 21.99° NNE |
| 4 mins | 2026-04-02 13:36:36.328Z | 21.298° NNE | 2026-04-02 13:38:36.328Z | 57.415° ENE | 18.842° | 2026-04-02 13:40:36.328Z | 92.054° ESE |
| 6 mins | 2026-04-02 15:14:36.328Z | 305.425° NW | 2026-04-02 15:16:36.328Z | 261.43° W | 29.882° | 2026-04-02 15:20:36.328Z | 186.24° SSW |
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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