STARLINK-35921, 66640
Orbit data source: Space-Track
STARLINK-35921, 66640 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sun, 23 Nov 2025 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). 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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66640 intel report (Beta)
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Edit Public Description
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
Expand to show TLE details & historyLast TLE update: 5 hours ago
TLE from 5 hours ago
0 STARLINK-35921
1 66640U 25271Z 25355.50002315 .00015643 00000-0 40036-3 0 9990
2 66640 53.1594 145.4883 0000888 104.4047 198.6803 15.39611072 5654Epoch: 2025-12-21T12:00Z
TLE epoch observation values (Epoch: 2025-12-21T12:00:02.000Z)
Latitude
-42.3111°
Longitude
-167.53547°
Altitude
461.953 km
Speed
7.635 km/s
True Right ascension
06h 51m 08s
True Declination
-42° 07' 57"
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
15:48:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
448.122 km
Perigee altitude
446.91 km
Semi-major axis
6,825.653 km
Eccentricity
0.00009
Inclination
53.1594°
RAAN
145.4883°
Arg. of periapsis
104.4047°
True anomaly
198.67704°
Mean anomaly
198.6803°
Eccentric anomaly
198.67867°
Mean motion
3.84881 °/min
Orbital period
93.54 mins
BSTAR
0.00040036
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Other satellites on launch #271 in the year 2025 (2025-11-23 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-35921 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 | 2025-12-21 18:57:54.333Z | 353.661° N | 2025-12-21 18:58:54.333Z | 21.33° NNE | 24.805° | 2025-12-21 19:01:54.333Z | 88.164° E |
| 4 mins | 2025-12-21 20:34:54.333Z | 276.917° WNW | 2025-12-21 20:36:54.333Z | 209.187° SW | 29.53° | 2025-12-21 20:38:54.333Z | 165.33° S |
| 5 mins | 2025-12-22 13:23:54.333Z | 266.257° W | 2025-12-22 13:25:54.333Z | 342.347° N | 33.939° | 2025-12-22 13:28:54.333Z | 38.922° NE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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