STARLINK-3517, 51735
Orbit data source: Space-Track
STARLINK-3517, 51735 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Mon, 21 Feb 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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51735 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-3517
1 51735U 22016X 26171.39783612 .00000428 00000-0 44966-4 0 9995
2 51735 53.1592 217.9307 0001000 79.0609 281.0495 15.08834753239073Epoch: 2026-06-20T09:32Z
TLE epoch observation values (Epoch: 2026-06-20T09:32:53.040Z)
Latitude
-0.00003°
Longitude
166.09664°
Altitude
540.518 km
Speed
7.593 km/s
True Right ascension
14h 31m 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
21:31:23
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.705 km
Perigee altitude
539.322 km
Semi-major axis
6,918.151 km
Eccentricity
0.0001
Inclination
53.1592°
RAAN
217.9307°
Arg. of periapsis
79.0609°
True anomaly
281.03825°
Mean anomaly
281.0495°
Eccentric anomaly
281.04388°
Mean motion
3.77188 °/min
Orbital period
95.44 mins
BSTAR
0.000044966
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Other satellites on launch #16 in the year 2022 (2022-02-21 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-3517 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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-06-22 11:17:21.957Z | 323.907° NNW | 2026-06-22 11:21:21.957Z | 41.281° NE | 29.206° | 2026-06-22 11:24:21.957Z | 94.784° ESE |
| 5 mins | 2026-06-22 12:58:21.957Z | 279.778° WNW | 2026-06-22 13:00:21.957Z | 228.664° WSW | 30.537° | 2026-06-22 13:03:21.957Z | 165.613° S |
| 6 mins | 2026-06-23 04:29:21.957Z | 192.084° SSW | 2026-06-23 04:31:21.957Z | 146.29° SSE | 32.233° | 2026-06-23 04:35:21.957Z | 64.059° ENE |
| 5 mins | 2026-06-23 06:09:21.957Z | 286.117° WNW | 2026-06-23 06:11:21.957Z | 339.282° N | 27.89° | 2026-06-23 06:14:21.957Z | 32.585° NE |
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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