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 25311.65922356 -.00005062 00000-0 -35961-3 0 9993
2 55617 43.0029 294.6682 0001322 279.4093 80.6600 15.02570034150714Epoch: 2025-11-07T15:49Z
TLE epoch observation values (Epoch: 2025-11-07T15:49:16.915Z)
Latitude
-0.00001°
Longitude
10.24769°
Altitude
558.604 km
Speed
7.584 km/s
True Right ascension
19h 38m 40s
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
06:10:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
561.816 km
Perigee altitude
559.981 km
Semi-major axis
6,939.035 km
Eccentricity
0.00013
Inclination
43.0029°
RAAN
294.6682°
Arg. of periapsis
279.4093°
True anomaly
80.67495°
Mean anomaly
80.66°
Eccentric anomaly
80.66747°
Mean motion
3.75487 °/min
Orbital period
95.88 mins
BSTAR
-0.00035961
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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 | 2025-11-09 01:30:45.461Z | 201.374° SSW | 2025-11-09 01:33:45.461Z | 147.49° SSE | 25.259° | 2025-11-09 01:36:45.461Z | 92.227° ESE |
| 6 mins | 2025-11-09 03:11:45.461Z | 254.889° W | 2025-11-09 03:13:45.461Z | 267.08° W | 43.244° | 2025-11-09 03:17:45.461Z | 71.34° E |
| 6 mins | 2025-11-09 04:52:45.461Z | 290.768° WNW | 2025-11-09 04:54:45.461Z | 339.101° N | 38.661° | 2025-11-09 04:58:45.461Z | 78.019° E |
| 6 mins | 2025-11-09 06:33:45.461Z | 288.109° WNW | 2025-11-09 06:35:45.461Z | 285.725° WNW | 44.565° | 2025-11-09 06:39:45.461Z | 109.566° ESE |
| 5 mins | 2025-11-09 08:14:45.461Z | 248.535° W | 2025-11-09 08:16:45.461Z | 204.754° SW | 22.698° | 2025-11-09 08:19:45.461Z | 159.336° 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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