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: 2 days ago
TLE from 2 days ago
0 STARLINK-5721
1 55617U 23020BA 26171.22334716 .00001030 00000-0 46958-4 0 9996
2 55617 43.0052 134.9014 0001697 290.9233 69.1437 15.27578850184723Epoch: 2026-06-20T05:21Z
TLE epoch observation values (Epoch: 2026-06-20T05:21:37.194Z)
Latitude
-0.00003°
Longitude
146.05534°
Altitude
482.414 km
Speed
7.626 km/s
True Right ascension
08h 59m 36s
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
21:48:33
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
486.162 km
Perigee altitude
483.832 km
Semi-major axis
6,863.134 km
Eccentricity
0.00017
Inclination
43.0052°
RAAN
134.9014°
Arg. of periapsis
290.9233°
True anomaly
69.16187°
Mean anomaly
69.1437°
Eccentric anomaly
69.15279°
Mean motion
3.81733 °/min
Orbital period
94.31 mins
BSTAR
0.000046958
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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 | 2026-06-22 23:27:29.645Z | 196.595° SSW | 2026-06-22 23:30:29.645Z | 135.985° SSE | 21.665° | 2026-06-22 23:32:29.645Z | 98.263° ESE |
| 6 mins | 2026-06-23 01:06:29.645Z | 252.933° W | 2026-06-23 01:08:29.645Z | 263.005° W | 44.073° | 2026-06-23 01:12:29.645Z | 71.731° E |
| 6 mins | 2026-06-23 02:45:29.645Z | 288.833° WNW | 2026-06-23 02:47:29.645Z | 333.444° NNW | 36.674° | 2026-06-23 02:51:29.645Z | 76.899° E |
| 6 mins | 2026-06-23 04:24:29.645Z | 289.378° WNW | 2026-06-23 04:27:29.645Z | 93.57° ESE | 42.976° | 2026-06-23 04:30:29.645Z | 106.363° ESE |
| 4 mins | 2026-06-23 06:04:29.645Z | 244.91° WSW | 2026-06-23 06:05:29.645Z | 220.842° SW | 22.762° | 2026-06-23 06:08:29.645Z | 160.59° S |
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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