STARLINK-3524, 51721
Orbit data source: Space-Track
STARLINK-3524, 51721 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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51721 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-3524
1 51721U 22016H 26171.41668980 .00015618 00000-0 80608-3 0 9992
2 51721 53.1591 227.7405 0002397 70.5784 73.1213 15.16505587 5826Epoch: 2026-06-20T10:00Z
TLE epoch observation values (Epoch: 2026-06-20T10:00:01.998Z)
Latitude
28.34657°
Longitude
-34.60083°
Altitude
517.372 km
Speed
7.609 km/s
True Right ascension
01h 36m 09s
True Declination
28° 11' 53"
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
21:34:03
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
518.319 km
Perigee altitude
515.014 km
Semi-major axis
6,894.804 km
Eccentricity
0.00024
Inclination
53.1591°
RAAN
227.7405°
Arg. of periapsis
70.5784°
True anomaly
73.14759°
Mean anomaly
73.1213°
Eccentric anomaly
73.13444°
Mean motion
3.79106 °/min
Orbital period
94.96 mins
BSTAR
0.00080608
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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-3524 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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-06-22 10:50:02.225Z | 344.884° N | 2026-06-22 10:52:02.225Z | 19.105° NNE | 15.516° | 2026-06-22 10:54:02.225Z | 52.172° ENE |
| 6 mins | 2026-06-22 12:29:02.225Z | 323.463° NNW | 2026-06-22 12:31:02.225Z | 8.993° NNE | 38.789° | 2026-06-22 12:35:02.225Z | 115.375° SE |
| 6 mins | 2026-06-23 05:34:02.225Z | 216.592° SW | 2026-06-23 05:36:02.225Z | 176.655° S | 41.983° | 2026-06-23 05:40:02.225Z | 54.618° ENE |
| 4 mins | 2026-06-23 07:14:02.225Z | 303.151° NW | 2026-06-23 07:15:02.225Z | 323.751° NNW | 20.611° | 2026-06-23 07:18:02.225Z | 22.469° NNE |
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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