STARLINK-3940, 52540
Orbit data source: Space-Track
STARLINK-3940, 52540 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Fri, 13 May 2022 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). 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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52540 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-3940
1 52540U 22051H 26171.29388067 -.00000746 00000-0 -28800-4 0 9997
2 52540 53.1596 28.4373 0001342 84.1021 276.0124 15.08836548226932Epoch: 2026-06-20T07:03Z
TLE epoch observation values (Epoch: 2026-06-20T07:03:11.289Z)
Latitude
0.00001°
Longitude
14.1297°
Altitude
540.548 km
Speed
7.593 km/s
True Right ascension
01h 53m 44s
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
21:31:08
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.937 km
Perigee altitude
539.08 km
Semi-major axis
6,918.145 km
Eccentricity
0.00013
Inclination
53.1596°
RAAN
28.4373°
Arg. of periapsis
84.1021°
True anomaly
275.99711°
Mean anomaly
276.0124°
Eccentric anomaly
276.00475°
Mean motion
3.77189 °/min
Orbital period
95.44 mins
BSTAR
-0.0000288
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Other satellites on launch #51 in the year 2022 (2022-05-13 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-3940 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 16:27:07.711Z | 220.709° SW | 2026-06-22 16:31:07.711Z | 89.95° E | 41.988° | 2026-06-22 16:34:07.711Z | 54.573° ENE |
| 5 mins | 2026-06-22 18:08:07.711Z | 292.519° NW | 2026-06-22 18:10:07.711Z | 329.948° NNW | 21.455° | 2026-06-22 18:13:07.711Z | 24.957° NE |
| 4 mins | 2026-06-22 21:30:07.711Z | 351.768° N | 2026-06-22 21:31:07.711Z | 9.412° NNE | 17.004° | 2026-06-22 21:34:07.711Z | 60.008° ENE |
| 6 mins | 2026-06-22 23:09:07.711Z | 318.837° NNW | 2026-06-22 23:11:07.711Z | 356.264° N | 41.371° | 2026-06-22 23:15:07.711Z | 120.87° 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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