STARLINK-3661, 52129
Orbit data source: Space-Track
STARLINK-3661, 52129 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sat, 19 Mar 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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52129 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-3661
1 52129U 22029AT 26171.41716597 .00000199 00000-0 30608-4 0 9991
2 52129 53.1604 327.8422 0001603 109.6623 250.4542 15.08843661236448Epoch: 2026-06-20T10:00Z
TLE epoch observation values (Epoch: 2026-06-20T10:00:43.139Z)
Latitude
0°
Longitude
-90.96963°
Altitude
540.995 km
Speed
7.593 km/s
True Right ascension
21h 51m 22s
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
21:24:24
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
541.095 km
Perigee altitude
538.877 km
Semi-major axis
6,918.123 km
Eccentricity
0.00016
Inclination
53.1604°
RAAN
327.8422°
Arg. of periapsis
109.6623°
True anomaly
250.43689°
Mean anomaly
250.4542°
Eccentric anomaly
250.44555°
Mean motion
3.7719 °/min
Orbital period
95.44 mins
BSTAR
0.000030608
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Other satellites on launch #29 in the year 2022 (2022-03-19 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-3661 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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-06-22 11:26:24.526Z | 169.723° S | 2026-06-22 11:29:24.526Z | 119.593° SE | 17.465° | 2026-06-22 11:31:24.526Z | 87.525° E |
| 6 mins | 2026-06-22 13:05:24.526Z | 248.148° W | 2026-06-22 13:08:24.526Z | 352.335° N | 39.624° | 2026-06-22 13:11:24.526Z | 42.15° NE |
| 4 mins | 2026-06-22 14:46:24.526Z | 314.4° NW | 2026-06-22 14:48:24.526Z | 349.759° N | 16.246° | 2026-06-22 14:50:24.526Z | 21.137° NNE |
| 5 mins | 2026-06-22 18:07:24.526Z | 346.411° N | 2026-06-22 18:09:24.526Z | 29.77° NE | 22.992° | 2026-06-22 18:12:24.526Z | 80.838° E |
| 6 mins | 2026-06-22 19:46:24.526Z | 298.46° NW | 2026-06-22 19:48:24.526Z | 257.822° W | 39.933° | 2026-06-22 19:52:24.526Z | 144.437° SSE |
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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