STARLINK-35915, 66521
Orbit data source: Space-Track
STARLINK-35915, 66521 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 19 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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66521 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: 20 hours ago
TLE from 20 hours ago
0 STARLINK-35915
1 66521U 25265F 26171.02524355 .00025235 00000-0 92201-3 0 9997
2 66521 43.0031 60.0632 0001443 268.8426 91.2261 15.27630102 32764Epoch: 2026-06-20T00:36Z
TLE epoch observation values (Epoch: 2026-06-20T00:36:21.042Z)
Latitude
0.00001°
Longitude
142.72975°
Altitude
482.696 km
Speed
7.626 km/s
True Right ascension
04h 00m 15s
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
07:17:08
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
485.834 km
Perigee altitude
483.853 km
Semi-major axis
6,862.981 km
Eccentricity
0.00014
Inclination
43.0031°
RAAN
60.0632°
Arg. of periapsis
268.8426°
True anomaly
91.24263°
Mean anomaly
91.2261°
Eccentric anomaly
91.23437°
Mean motion
3.81746 °/min
Orbital period
94.3 mins
BSTAR
0.00092201
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Other satellites on launch #265 in the year 2025 (2025-11-19 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-35915 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 | 2026-06-20 21:16:23.532Z | 259.68° W | 2026-06-20 21:19:23.532Z | 309.801° NW | 43.468° | 2026-06-20 21:22:23.532Z | 69.225° E |
| 6 mins | 2026-06-20 22:56:23.532Z | 291.788° WNW | 2026-06-20 22:58:23.532Z | 337.789° N | 37.092° | 2026-06-20 23:02:23.532Z | 80.445° E |
| 6 mins | 2026-06-21 00:35:23.532Z | 285.942° WNW | 2026-06-21 00:37:23.532Z | 270.335° WNW | 42.062° | 2026-06-21 00:41:23.532Z | 113.867° SE |
| 4 mins | 2026-06-21 19:11:23.532Z | 191.02° SSW | 2026-06-21 19:13:23.532Z | 135.633° SSE | 26.061° | 2026-06-21 19:15:23.532Z | 94.475° ESE |
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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