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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Edit Public Description
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: 18 hours ago
TLE from 18 hours ago
0 STARLINK-5721
1 55617U 23020BA 25340.51061327 .00000440 00000-0 47639-4 0 9991
2 55617 43.0028 137.8959 0001240 265.1483 94.9218 15.02533983155059Epoch: 2025-12-06T12:15Z
TLE epoch observation values (Epoch: 2025-12-06T12:15:16.986Z)
Latitude
-0°
Longitude
-121.46219°
Altitude
558.938 km
Speed
7.584 km/s
True Right ascension
09h 11m 35s
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
04:18:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
561.87 km
Perigee altitude
560.149 km
Semi-major axis
6,939.146 km
Eccentricity
0.00012
Inclination
43.0028°
RAAN
137.8959°
Arg. of periapsis
265.1483°
True anomaly
94.93596°
Mean anomaly
94.9218°
Eccentric anomaly
94.92888°
Mean motion
3.75478 °/min
Orbital period
95.88 mins
BSTAR
0.000047639
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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 | 2025-12-07 14:00:49.619Z | 216.756° SW | 2025-12-07 14:02:49.619Z | 163.281° S | 37.109° | 2025-12-07 14:06:49.619Z | 78.594° E |
| 7 mins | 2025-12-07 15:40:49.619Z | 271.594° WNW | 2025-12-07 15:43:49.619Z | 3.068° NNE | 41.779° | 2025-12-07 15:47:49.619Z | 72.17° E |
| 6 mins | 2025-12-07 17:21:49.619Z | 291.833° WNW | 2025-12-07 17:24:49.619Z | 22.563° NE | 40.88° | 2025-12-07 17:27:49.619Z | 86.287° E |
| 6 mins | 2025-12-07 19:02:49.619Z | 277.474° WNW | 2025-12-07 19:05:49.619Z | 175.583° S | 38.674° | 2025-12-07 19:08:49.619Z | 129.141° 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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