STARLINK-3657, 51990
Orbit data source: Space-Track
STARLINK-3657, 51990 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 09 Mar 2022 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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51990 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
297 kg wet, ~275 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-3657
1 51990U 22025AL 26171.28560286 .00000386 00000-0 42331-4 0 9993
2 51990 53.1597 278.4318 0001067 82.5600 277.5512 15.08828058236829Epoch: 2026-06-20T06:51Z
TLE epoch observation values (Epoch: 2026-06-20T06:51:16.087Z)
Latitude
-0.00005°
Longitude
-92.88768°
Altitude
540.574 km
Speed
7.593 km/s
True Right ascension
18h 33m 43s
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
21:36:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.772 km
Perigee altitude
539.296 km
Semi-major axis
6,918.171 km
Eccentricity
0.00011
Inclination
53.1597°
RAAN
278.4318°
Arg. of periapsis
82.56°
True anomaly
277.53908°
Mean anomaly
277.5512°
Eccentric anomaly
277.54514°
Mean motion
3.77187 °/min
Orbital period
95.44 mins
BSTAR
0.000042331
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Other satellites on launch #25 in the year 2022 (2022-03-09 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-3657 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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-06-22 11:37:13.954Z | 314.61° NW | 2026-06-22 11:39:13.954Z | 348.238° N | 15.52° | 2026-06-22 11:41:13.954Z | 19.794° NNE |
| 5 mins | 2026-06-22 14:58:13.954Z | 343.589° N | 2026-06-22 15:00:13.954Z | 28.046° NE | 24.871° | 2026-06-22 15:03:13.954Z | 83.433° E |
| 6 mins | 2026-06-22 16:37:13.954Z | 294.157° NW | 2026-06-22 16:39:13.954Z | 252.739° W | 36.782° | 2026-06-22 16:43:13.954Z | 150.185° SSE |
| 5 mins | 2026-06-23 08:09:13.954Z | 172.084° S | 2026-06-23 08:11:13.954Z | 125.435° SE | 25.162° | 2026-06-23 08:14:13.954Z | 73.256° E |
| 5 mins | 2026-06-23 09:48:13.954Z | 269.836° W | 2026-06-23 09:50:13.954Z | 325.717° NNW | 33.52° | 2026-06-23 09:53:13.954Z | 33.68° NE |
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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