STARLINK-3540, 51719
Orbit data source: Space-Track
STARLINK-3540, 51719 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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51719 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-3540
1 51719U 22016F 26171.41165080 -.00000154 00000-0 83964-5 0 9992
2 51719 53.1596 227.9452 0001173 89.6047 270.5078 15.08831547238937Epoch: 2026-06-20T09:52Z
TLE epoch observation values (Epoch: 2026-06-20T09:52:46.629Z)
Latitude
-0.00007°
Longitude
171.12421°
Altitude
540.653 km
Speed
7.593 km/s
True Right ascension
15h 11m 46s
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
21:31:46
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.835 km
Perigee altitude
539.212 km
Semi-major axis
6,918.16 km
Eccentricity
0.00012
Inclination
53.1596°
RAAN
227.9452°
Arg. of periapsis
89.6047°
True anomaly
270.49436°
Mean anomaly
270.5078°
Eccentric anomaly
270.50108°
Mean motion
3.77187 °/min
Orbital period
95.44 mins
BSTAR
0.0000083964
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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-3540 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 | 2026-06-22 11:36:44.962Z | 329.492° NNW | 2026-06-22 11:39:44.962Z | 19.956° NNE | 23.901° | 2026-06-22 11:42:44.962Z | 78.939° E |
| 6 mins | 2026-06-22 13:16:44.962Z | 298.035° NW | 2026-06-22 13:19:44.962Z | 211.289° SW | 39.451° | 2026-06-22 13:22:44.962Z | 148.939° SSE |
| 5 mins | 2026-06-23 04:48:44.962Z | 174.478° S | 2026-06-23 04:50:44.962Z | 133.814° SE | 23.8° | 2026-06-23 04:53:44.962Z | 77.379° E |
| 6 mins | 2026-06-23 06:27:44.962Z | 263.813° W | 2026-06-23 06:29:44.962Z | 311.678° NW | 34.225° | 2026-06-23 06:33:44.962Z | 38.861° 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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