STARLINK-5721, 55617
Orbit data source: Space-Track
STARLINK-5721, 55617 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sun, 12 Feb 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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55617 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational spacecraft
Bus & Motor
STARLINK, Unknown motor
Mass
305 kg wet, ~290 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown shape, 10.1 m
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 15 hours ago
TLE from 15 hours ago
0 STARLINK-5721
1 55617U 23020BA 26062.26421372 .00000510 00000-0 52800-4 0 9999
2 55617 43.0052 26.4997 0001219 269.6459 90.4244 15.02534411168106Epoch: 2026-03-03T06:20Z
TLE epoch observation values (Epoch: 2026-03-03T06:20:28.065Z)
Latitude
0.00001°
Longitude
130.337°
Altitude
558.869 km
Speed
7.584 km/s
True Right ascension
01h 45m 59s
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
01:13:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
561.853 km
Perigee altitude
560.162 km
Semi-major axis
6,939.144 km
Eccentricity
0.00012
Inclination
43.0052°
RAAN
26.4997°
Arg. of periapsis
269.6459°
True anomaly
90.43837°
Mean anomaly
90.4244°
Eccentric anomaly
90.43138°
Mean motion
3.75478 °/min
Orbital period
95.88 mins
BSTAR
0.0000528
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Other satellites on launch #20 in the year 2023 (2023-02-12 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-5721 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 | 2026-03-04 00:04:28.977Z | 189.682° SSW | 2026-03-04 00:07:28.977Z | 135.678° SSE | 20.841° | 2026-03-04 00:09:28.977Z | 101.383° ESE |
| 7 mins | 2026-03-04 01:44:28.977Z | 246.898° WSW | 2026-03-04 01:47:28.977Z | 130.527° SE | 44.792° | 2026-03-04 01:51:28.977Z | 72.534° E |
| 6 mins | 2026-03-04 03:25:28.977Z | 284.75° WNW | 2026-03-04 03:28:28.977Z | 12.243° NNE | 39.178° | 2026-03-04 03:31:28.977Z | 73.538° E |
| 6 mins | 2026-03-04 05:06:28.977Z | 290.435° WNW | 2026-03-04 05:09:28.977Z | 69.522° E | 43.819° | 2026-03-04 05:12:28.977Z | 102.861° ESE |
| 5 mins | 2026-03-04 06:47:28.977Z | 260.574° W | 2026-03-04 06:49:28.977Z | 217.054° SW | 27.304° | 2026-03-04 06:52:28.977Z | 156.699° 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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