STARLINK-35966, 66821
Orbit data source: Space-Track
STARLINK-35966, 66821 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Tue, 02 Dec 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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66821 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-35966
1 66821U 25280A 26171.44967947 .00002161 00000-0 18878-3 0 9992
2 66821 70.0015 75.5573 0002718 262.9889 97.0961 14.98345370 31462Epoch: 2026-06-20T10:47Z
TLE epoch observation values (Epoch: 2026-06-20T10:47:32.306Z)
Latitude
-0.00001°
Longitude
5.00855°
Altitude
574.666 km
Speed
7.574 km/s
True Right ascension
05h 02m 13s
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
08:33:21
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
571.845 km
Perigee altitude
568.068 km
Semi-major axis
6,948.093 km
Eccentricity
0.00027
Inclination
70.0015°
RAAN
75.5573°
Arg. of periapsis
262.9889°
True anomaly
97.12701°
Mean anomaly
97.0961°
Eccentric anomaly
97.11155°
Mean motion
3.74753 °/min
Orbital period
96.06 mins
BSTAR
0.00018878
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Other satellites on launch #280 in the year 2025 (2025-12-02 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-35966 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 | 2026-06-21 04:59:23.388Z | 322.178° NNW | 2026-06-21 05:01:23.388Z | 281.658° WNW | 39.618° | 2026-06-21 05:05:23.388Z | 170.533° S |
| 6 mins | 2026-06-21 18:59:23.388Z | 205.713° SW | 2026-06-21 19:01:23.388Z | 218.591° SW | 44.098° | 2026-06-21 19:05:23.388Z | 23.424° NE |
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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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 |
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