STARLINK-3447, 51736
Orbit data source: Space-Track
STARLINK-3447, 51736 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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51736 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-3447
1 51736U 22016Y 26171.39146118 .00000515 00000-0 50445-4 0 9996
2 51736 53.1597 218.0468 0001341 90.9650 269.1495 15.08831486239061Epoch: 2026-06-20T09:23Z
TLE epoch observation values (Epoch: 2026-06-20T09:23:42.245Z)
Latitude
-0.00005°
Longitude
168.51399°
Altitude
540.675 km
Speed
7.593 km/s
True Right ascension
14h 32m 11s
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
21:32:12
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.951 km
Perigee altitude
539.096 km
Semi-major axis
6,918.161 km
Eccentricity
0.00013
Inclination
53.1597°
RAAN
218.0468°
Arg. of periapsis
90.965°
True anomaly
269.13414°
Mean anomaly
269.1495°
Eccentric anomaly
269.14182°
Mean motion
3.77187 °/min
Orbital period
95.44 mins
BSTAR
0.000050445
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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-3447 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 11:08:10.730Z | 328.409° NNW | 2026-06-22 11:11:10.730Z | 21.345° NNE | 26.533° | 2026-06-22 11:14:10.730Z | 84.526° E |
| 6 mins | 2026-06-22 12:48:10.730Z | 291.88° WNW | 2026-06-22 12:51:10.730Z | 211.749° SW | 34.559° | 2026-06-22 12:54:10.730Z | 156.239° SSE |
| 5 mins | 2026-06-23 04:20:10.730Z | 180.031° SSW | 2026-06-23 04:22:10.730Z | 131.556° SE | 28.27° | 2026-06-23 04:25:10.730Z | 72.155° E |
| 6 mins | 2026-06-23 05:59:10.730Z | 271.65° WNW | 2026-06-23 06:01:10.730Z | 317.768° NNW | 30.822° | 2026-06-23 06:05:10.730Z | 37.049° 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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