STARLINK-35657, 66399
Orbit data source: Space-Track
STARLINK-35657, 66399 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sat, 08 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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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: 21 hours ago
TLE from 21 hours ago
0 STARLINK-35657
1 66399U 25257V 26170.97645852 .00018161 00000-0 54679-3 0 9997
2 66399 53.1591 100.5228 0001196 93.2219 266.8921 15.34431665 35404Epoch: 2026-06-19T23:26Z
TLE epoch observation values (Epoch: 2026-06-19T23:26:06.016Z)
Latitude
0.00004°
Longitude
-159.19994°
Altitude
463.555 km
Speed
7.636 km/s
True Right ascension
06h 42m 05s
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
07:18:20
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
463.684 km
Perigee altitude
462.048 km
Semi-major axis
6,841.003 km
Eccentricity
0.00012
Inclination
53.1591°
RAAN
100.5228°
Arg. of periapsis
93.2219°
True anomaly
266.87842°
Mean anomaly
266.8921°
Eccentric anomaly
266.88526°
Mean motion
3.83587 °/min
Orbital period
93.85 mins
BSTAR
0.00054679
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Other satellites on launch #257 in the year 2025 (2025-11-08 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-35657 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 21:28:35.461Z | 205.799° SW | 2026-06-20 21:31:35.461Z | 148.74° SSE | 33.689° | 2026-06-20 21:34:35.461Z | 66.321° ENE |
| 5 mins | 2026-06-20 23:07:35.461Z | 284.48° WNW | 2026-06-20 23:09:35.461Z | 331.066° NNW | 23.719° | 2026-06-20 23:12:35.461Z | 29.717° NE |
| 5 mins | 2026-06-21 04:03:35.461Z | 334.229° NNW | 2026-06-21 04:05:35.461Z | 30.276° NE | 31.723° | 2026-06-21 04:08:35.461Z | 100.571° ESE |
| 4 mins | 2026-06-21 05:41:35.461Z | 267.13° W | 2026-06-21 05:43:35.461Z | 216.773° SW | 22.013° | 2026-06-21 05:45:35.461Z | 178.724° S |
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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