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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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, Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 STARLINK-34121
1 63961U 25099K 25346.25187639 .00032380 00000-0 11825-2 0 9996
2 63961 42.9992 310.0404 0001473 263.1421 96.9263 15.27537779 33967Epoch: 2025-12-12T06:02Z
TLE epoch observation values (Epoch: 2025-12-12T06:02:42.120Z)
Latitude
-0.00001°
Longitude
138.16872°
Altitude
483.073 km
Speed
7.626 km/s
True Right ascension
20h 40m 09s
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
07:35:04
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
486.132 km
Perigee altitude
484.11 km
Semi-major axis
6,863.258 km
Eccentricity
0.00015
Inclination
42.9992°
RAAN
310.0404°
Arg. of periapsis
263.1421°
True anomaly
96.94306°
Mean anomaly
96.9263°
Eccentric anomaly
96.93468°
Mean motion
3.81722 °/min
Orbital period
94.31 mins
BSTAR
0.0011825
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2025-12-14 00:37:19.459Z | 218.341° SW | 2025-12-14 00:40:19.459Z | 150.952° SSE | 32.687° | 2025-12-14 00:43:19.459Z | 84.185° E |
| 5 mins | 2025-12-14 02:17:19.459Z | 272.879° WNW | 2025-12-14 02:19:19.459Z | 3.691° NNE | 42.023° | 2025-12-14 02:22:19.459Z | 69.405° E |
| 5 mins | 2025-12-14 03:56:19.459Z | 296.195° NW | 2025-12-14 03:58:19.459Z | 1.171° NNE | 39.083° | 2025-12-14 04:01:19.459Z | 81.775° E |
| 5 mins | 2025-12-14 05:35:19.459Z | 279.451° WNW | 2025-12-14 05:37:19.459Z | 213.967° SW | 42.139° | 2025-12-14 05:40:19.459Z | 123.534° SE |
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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