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.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
66640 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
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: 6 hours ago
TLE from 6 hours ago
0 STARLINK-35921
1 66640U 25271Z 26037.09483335 .00035231 00000-0 11962-2 0 9997
2 66640 53.1589 286.3864 0001349 67.5793 292.5351 15.30193371 12739Epoch: 2026-02-06T02:16Z
TLE epoch observation values (Epoch: 2026-02-06T02:16:33.601Z)
Latitude
0.00002°
Longitude
116.00877°
Altitude
475.78 km
Speed
7.629 km/s
True Right ascension
19h 05m 32s
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
10:34:36
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
476.416 km
Perigee altitude
474.567 km
Semi-major axis
6,853.628 km
Eccentricity
0.00013
Inclination
53.1589°
RAAN
286.3864°
Arg. of periapsis
67.5793°
True anomaly
292.52082°
Mean anomaly
292.5351°
Eccentric anomaly
292.52796°
Mean motion
3.82527 °/min
Orbital period
94.11 mins
BSTAR
0.0011962
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #271 in the year 2025 (2025-11-23 UTC)
Did you know?
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
Loading observer location...
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 | 2026-02-06 18:06:06.957Z | 169.922° S | 2026-02-06 18:08:06.957Z | 135.368° SSE | 17.023° | 2026-02-06 18:10:06.957Z | 95.653° ESE |
| 5 mins | 2026-02-06 19:44:06.957Z | 256.671° W | 2026-02-06 19:46:06.957Z | 328.363° NNW | 38.201° | 2026-02-06 19:49:06.957Z | 39.663° NE |
| 4 mins | 2026-02-07 00:41:06.957Z | 346.957° N | 2026-02-07 00:43:06.957Z | 31.272° NE | 20.595° | 2026-02-07 00:45:06.957Z | 70.793° E |
| 5 mins | 2026-02-07 02:19:06.957Z | 296.442° NW | 2026-02-07 02:21:06.957Z | 217.577° SW | 41.219° | 2026-02-07 02:24:06.957Z | 144.481° 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 |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
|---|