STARLINK-5475, 55661
Orbit data source: Space-Track
STARLINK-5475, 55661 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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55661 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: 8 hours ago
TLE from 8 hours ago
0 STARLINK-5475
1 55661U 23021AK 26091.38790131 .00000928 00000-0 85578-4 0 9997
2 55661 69.9983 107.2633 0003351 270.3858 89.6918 14.98321063172688Epoch: 2026-04-01T09:18Z
TLE epoch observation values (Epoch: 2026-04-01T09:18:34.673Z)
Latitude
0.00008°
Longitude
137.8674°
Altitude
574.495 km
Speed
7.574 km/s
True Right ascension
07h 09m 03s
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
23:08:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
572.36 km
Perigee altitude
567.704 km
Semi-major axis
6,948.169 km
Eccentricity
0.00034
Inclination
69.9983°
RAAN
107.2633°
Arg. of periapsis
270.3858°
True anomaly
89.7302°
Mean anomaly
89.6918°
Eccentric anomaly
89.711°
Mean motion
3.74747 °/min
Orbital period
96.06 mins
BSTAR
0.000085578
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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-5475 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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-04-02 01:28:23.006Z | 137.995° SSE | 2026-04-02 01:30:23.006Z | 103.947° ESE | 17.793° | 2026-04-02 01:32:23.006Z | 69.995° E |
| 5 mins | 2026-04-02 03:06:23.006Z | 249.961° W | 2026-04-02 03:08:23.006Z | 299.375° NW | 29.869° | 2026-04-02 03:11:23.006Z | 0.964° NNE |
| 6 mins | 2026-04-02 11:30:23.006Z | 4.229° NNE | 2026-04-02 11:32:23.006Z | 53.847° ENE | 32.613° | 2026-04-02 11:36:23.006Z | 130.893° 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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