STARLINK-34121, 63961
Orbit data source: Space-Track
STARLINK-34121, 63961 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Tue, 13 May 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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63961 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: 12 hours ago
TLE from 12 hours ago
0 STARLINK-34121
1 63961U 25099K 26171.46102456 .00015389 00000-0 56709-3 0 9991
2 63961 42.9997 315.8351 0001904 189.6926 170.3889 15.27609130 63052Epoch: 2026-06-20T11:03Z
TLE epoch observation values (Epoch: 2026-06-20T11:03:52.521Z)
Latitude
-0.00005°
Longitude
-118.80911°
Altitude
484.025 km
Speed
7.624 km/s
True Right ascension
21h 03m 20s
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
10:20:17
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
486.214 km
Perigee altitude
483.6 km
Semi-major axis
6,863.044 km
Eccentricity
0.00019
Inclination
42.9997°
RAAN
315.8351°
Arg. of periapsis
189.6926°
True anomaly
170.39254°
Mean anomaly
170.3889°
Eccentric anomaly
170.39072°
Mean motion
3.8174 °/min
Orbital period
94.3 mins
BSTAR
0.00056709
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Other satellites on launch #99 in the year 2025 (2025-05-13 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-34121 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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-06-21 12:22:01.794Z | 198.817° SSW | 2026-06-21 12:25:01.794Z | 133.255° SE | 23.265° | 2026-06-21 12:27:01.794Z | 95.629° ESE |
| 5 mins | 2026-06-21 14:01:01.794Z | 256.599° W | 2026-06-21 14:03:01.794Z | 288.367° WNW | 44.204° | 2026-06-21 14:06:01.794Z | 70.412° E |
| 6 mins | 2026-06-21 15:40:01.794Z | 290.352° WNW | 2026-06-21 15:42:01.794Z | 337.369° NNW | 36.985° | 2026-06-21 15:46:01.794Z | 78.333° E |
| 6 mins | 2026-06-21 17:19:01.794Z | 288.226° WNW | 2026-06-21 17:22:01.794Z | 108.642° ESE | 42.372° | 2026-06-21 17:25:01.794Z | 109.181° ESE |
| 4 mins | 2026-06-21 18:59:01.794Z | 241.35° WSW | 2026-06-21 19:00:01.794Z | 218.121° SW | 20.985° | 2026-06-21 19:03:01.794Z | 162.607° S |
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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