STARLINK-3509, 51737
Orbit data source: Space-Track
STARLINK-3509, 51737 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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51737 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-3509
1 51737U 22016Z 26171.39415560 .00000179 00000-0 29338-4 0 9990
2 51737 53.1596 217.9472 0001042 86.5958 273.5153 15.08836894239062Epoch: 2026-06-20T09:27Z
TLE epoch observation values (Epoch: 2026-06-20T09:27:35.043Z)
Latitude
-0.00001°
Longitude
167.44177°
Altitude
540.6 km
Speed
7.593 km/s
True Right ascension
14h 31m 47s
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
21:33:11
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.728 km
Perigee altitude
539.286 km
Semi-major axis
6,918.144 km
Eccentricity
0.0001
Inclination
53.1596°
RAAN
217.9472°
Arg. of periapsis
86.5958°
True anomaly
273.50338°
Mean anomaly
273.5153°
Eccentric anomaly
273.50934°
Mean motion
3.77189 °/min
Orbital period
95.44 mins
BSTAR
0.000029338
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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-3509 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 11:12:10.044Z | 327.147° NNW | 2026-06-22 11:15:10.044Z | 19.127° NNE | 27.586° | 2026-06-22 11:18:10.044Z | 86.086° E |
| 6 mins | 2026-06-22 12:52:10.044Z | 290.092° WNW | 2026-06-22 12:55:10.044Z | 215.639° SW | 32.717° | 2026-06-22 12:58:10.044Z | 159.581° S |
| 5 mins | 2026-06-23 04:24:10.044Z | 183.903° SSW | 2026-06-23 04:26:10.044Z | 133.303° SE | 30.198° | 2026-06-23 04:29:10.044Z | 70.673° E |
| 6 mins | 2026-06-23 06:03:10.044Z | 273.551° WNW | 2026-06-23 06:05:10.044Z | 316.784° NNW | 29.316° | 2026-06-23 06:09:10.044Z | 35.896° 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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