STARLINK-35663, 66491
Orbit data source: Space-Track
STARLINK-35663, 66491 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sat, 15 Nov 2025 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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66491 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational Commercial Communications
Bus & Motor
STARLINK V2MO, Unknown motor
Mass
575 kg wet, ~530 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 17.7 m
Radar Cross Section
36.964 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 11 hours ago
TLE from 11 hours ago
0 STARLINK-35663
1 66491U 25263G 26171.38542598 .00008981 00000-0 33537-3 0 9995
2 66491 43.0006 130.8287 0001040 268.6290 91.4442 15.27590720 34603Epoch: 2026-06-20T09:15Z
TLE epoch observation values (Epoch: 2026-06-20T09:15:00.804Z)
Latitude
-0.00006°
Longitude
83.47448°
Altitude
482.811 km
Speed
7.626 km/s
True Right ascension
08h 43m 18s
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
07:16:12
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
485.676 km
Perigee altitude
484.248 km
Semi-major axis
6,863.099 km
Eccentricity
0.0001
Inclination
43.0006°
RAAN
130.8287°
Arg. of periapsis
268.629°
True anomaly
91.45611°
Mean anomaly
91.4442°
Eccentric anomaly
91.45016°
Mean motion
3.81736 °/min
Orbital period
94.31 mins
BSTAR
0.00033537
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Other satellites on launch #263 in the year 2025 (2025-11-15 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-35663 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 | 2026-06-21 01:11:27.256Z | 228.394° WSW | 2026-06-21 01:13:27.256Z | 144.786° SSE | 41.21° | 2026-06-21 01:16:27.256Z | 77.112° E |
| 5 mins | 2026-06-21 02:50:27.256Z | 284.576° WNW | 2026-06-21 02:52:27.256Z | 0.947° NNE | 39.318° | 2026-06-21 02:55:27.256Z | 70.271° E |
| 5 mins | 2026-06-21 04:29:27.256Z | 295.514° NW | 2026-06-21 04:31:27.256Z | 359.648° N | 41.655° | 2026-06-21 04:34:27.256Z | 91.11° ESE |
| 5 mins | 2026-06-21 06:08:27.256Z | 267.882° W | 2026-06-21 06:10:27.256Z | 208.238° SW | 34.025° | 2026-06-21 06:13:27.256Z | 139.374° 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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