STARLINK-36121, 66940
Orbit data source: Space-Track
STARLINK-36121, 66940 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sun, 07 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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66940 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: 10 hours ago
TLE from 10 hours ago
0 STARLINK-36121
1 66940U 25286R 26171.43602586 .00019664 00000-0 59145-3 0 9992
2 66940 53.1577 240.0746 0000944 81.3174 278.7936 15.34407803 31167Epoch: 2026-06-20T10:27Z
TLE epoch observation values (Epoch: 2026-06-20T10:27:52.634Z)
Latitude
0.00003°
Longitude
174.45464°
Altitude
463.482 km
Speed
7.636 km/s
True Right ascension
16h 00m 17s
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
07:12:46
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
463.583 km
Perigee altitude
462.292 km
Semi-major axis
6,841.074 km
Eccentricity
0.00009
Inclination
53.1577°
RAAN
240.0746°
Arg. of periapsis
81.3174°
True anomaly
278.78291°
Mean anomaly
278.7936°
Eccentric anomaly
278.78825°
Mean motion
3.83581 °/min
Orbital period
93.85 mins
BSTAR
0.00059145
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Other satellites on launch #286 in the year 2025 (2025-12-07 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-36121 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 06:57:02.271Z | 213.097° SW | 2026-06-21 07:00:02.271Z | 152.198° SSE | 38.961° | 2026-06-21 07:03:02.271Z | 60.709° ENE |
| 5 mins | 2026-06-21 13:32:02.271Z | 329.731° NNW | 2026-06-21 13:34:02.271Z | 31.052° NE | 35.88° | 2026-06-21 13:37:02.271Z | 107.451° ESE |
| 4 mins | 2026-06-21 15:10:02.271Z | 262.092° W | 2026-06-21 15:11:02.271Z | 241.604° WSW | 18.192° | 2026-06-21 15:14:02.271Z | 184.288° SSW |
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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