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: 8 hours ago
TLE from 8 hours ago
0 STARLINK-34121
1 63961U 25099K 26094.23964149 .00026170 00000-0 95736-3 0 9998
2 63961 42.9998 31.9464 0001218 255.7296 104.3420 15.27572604 51248Epoch: 2026-04-04T05:45Z
TLE epoch observation values (Epoch: 2026-04-04T05:45:05.024Z)
Latitude
-0.00006°
Longitude
113.11314°
Altitude
483.054 km
Speed
7.626 km/s
True Right ascension
02h 07m 47s
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
19:13:36
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
485.852 km
Perigee altitude
484.181 km
Semi-major axis
6,863.153 km
Eccentricity
0.00012
Inclination
42.9998°
RAAN
31.9464°
Arg. of periapsis
255.7296°
True anomaly
104.35552°
Mean anomaly
104.342°
Eccentric anomaly
104.34876°
Mean motion
3.81731 °/min
Orbital period
94.31 mins
BSTAR
0.00095736
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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 23:13:34.339Z | 221.285° SW | 2026-04-04 23:16:34.339Z | 148.301° SSE | 34.65° | 2026-04-04 23:19:34.339Z | 82.325° E |
| 5 mins | 2026-04-05 00:53:34.339Z | 276.073° WNW | 2026-04-05 00:55:34.339Z | 6.228° NNE | 41.273° | 2026-04-05 00:58:34.339Z | 69.518° E |
| 5 mins | 2026-04-05 02:32:34.339Z | 296.682° NW | 2026-04-05 02:34:34.339Z | 4.032° NNE | 39.551° | 2026-04-05 02:37:34.339Z | 83.672° E |
| 5 mins | 2026-04-05 04:11:34.339Z | 276.876° WNW | 2026-04-05 04:13:34.339Z | 208.393° SW | 40.833° | 2026-04-05 04:16:34.339Z | 126.722° 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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