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 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: 6 hours ago
TLE from 6 hours ago
0 STARLINK-5721
1 55617U 23020BA 26264.26825615 .00000503 00000-0 27805-4 0 9990
2 55617 43.0012 329.4395 0001260 272.2698 87.8010 15.27576958198957Epoch: 2026-09-21T06:26Z
TLE epoch observation values (Epoch: 2026-09-21T06:26:17.331Z)
Latitude
0.00003°
Longitude
-127.2832°
Altitude
482.801 km
Speed
7.626 km/s
True Right ascension
21h 57m 45s
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
04:58:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
485.868 km
Perigee altitude
484.138 km
Semi-major axis
6,863.14 km
Eccentricity
0.00013
Inclination
43.0012°
RAAN
329.4395°
Arg. of periapsis
272.2698°
True anomaly
87.81543°
Mean anomaly
87.801°
Eccentric anomaly
87.80821°
Mean motion
3.81732 °/min
Orbital period
94.31 mins
BSTAR
0.000027805
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-09-21 13:10:37.874Z | 280.941° WNW | 2026-09-21 13:13:37.874Z | 186.943° SSW | 57.326° | 2026-09-21 13:16:37.874Z | 126.85° SE |
| 5 mins | 2026-09-22 07:46:37.874Z | 213.048° SW | 2026-09-22 07:48:37.874Z | 146.921° SSE | 45.219° | 2026-09-22 07:51:37.874Z | 81.57° E |
| 5 mins | 2026-09-22 09:25:37.874Z | 277.361° WNW | 2026-09-22 09:27:37.874Z | 6.458° NNE | 60.144° | 2026-09-22 09:30:37.874Z | 69.145° E |
| 5 mins | 2026-09-22 11:04:37.874Z | 297.318° NW | 2026-09-22 11:06:37.874Z | 4.319° NNE | 55.321° | 2026-09-22 11:09:37.874Z | 83.551° E |
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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