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: 16 hours ago
TLE from 16 hours ago
0 STARLINK-34121
1 63961U 25099K 26093.84731638 .00018627 00000-0 68469-3 0 9990
2 63961 43.0014 34.1611 0002117 262.8758 97.1853 15.27579767 51188Epoch: 2026-04-03T20:20Z
TLE epoch observation values (Epoch: 2026-04-03T20:20:08.135Z)
Latitude
-0.00001°
Longitude
-103.04837°
Altitude
483.007 km
Speed
7.626 km/s
True Right ascension
02h 16m 38s
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
18:29:00
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
486.448 km
Perigee altitude
483.542 km
Semi-major axis
6,863.132 km
Eccentricity
0.00021
Inclination
43.0014°
RAAN
34.1611°
Arg. of periapsis
262.8758°
True anomaly
97.20937°
Mean anomaly
97.1853°
Eccentric anomaly
97.19733°
Mean motion
3.81733 °/min
Orbital period
94.31 mins
BSTAR
0.00068469
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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 | 2026-04-04 23:13:06.523Z | 223.776° SW | 2026-04-04 23:16:06.523Z | 170.26° S | 33.924° | 2026-04-04 23:19:06.523Z | 85.271° E |
| 5 mins | 2026-04-05 00:53:06.523Z | 272.759° WNW | 2026-04-05 00:55:06.523Z | 324.42° NNW | 40.936° | 2026-04-05 00:58:06.523Z | 67.818° E |
| 6 mins | 2026-04-05 02:32:06.523Z | 293.26° NW | 2026-04-05 02:34:06.523Z | 334.284° NNW | 37.778° | 2026-04-05 02:38:06.523Z | 85.966° E |
| 6 mins | 2026-04-05 04:11:06.523Z | 279.741° WNW | 2026-04-05 04:13:06.523Z | 241.682° WSW | 38.87° | 2026-04-05 04:17:06.523Z | 124.878° 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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