STARLINK-5901, 55999
Orbit data source: Space-Track
STARLINK-5901, 55999 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Fri, 24 Mar 2023 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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55999 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational Commercial Communications
Bus & Motor
STARLINK, Unknown motor
Mass
305 kg wet, ~290 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 1 Pan, 10.1 m
Radar Cross Section
11.087 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 STARLINK-5901
1 55999U 23042P 26171.38575360 .00002297 00000-0 92948-4 0 9998
2 55999 43.0074 199.7904 0001082 307.1879 52.8874 15.27588187178576Epoch: 2026-06-20T09:15Z
TLE epoch observation values (Epoch: 2026-06-20T09:15:29.111Z)
Latitude
0.00001°
Longitude
152.31798°
Altitude
482.353 km
Speed
7.626 km/s
True Right ascension
13h 19m 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
21:33:30
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
485.711 km
Perigee altitude
484.226 km
Semi-major axis
6,863.106 km
Eccentricity
0.00011
Inclination
43.0074°
RAAN
199.7904°
Arg. of periapsis
307.1879°
True anomaly
52.89729°
Mean anomaly
52.8874°
Eccentric anomaly
52.89234°
Mean motion
3.81735 °/min
Orbital period
94.31 mins
BSTAR
0.000092948
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Other satellites on launch #42 in the year 2023 (2023-03-24 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-5901 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 | 2026-06-23 04:59:28.548Z | 235.301° WSW | 2026-06-23 05:01:28.548Z | 142.209° SSE | 43.07° | 2026-06-23 05:04:28.548Z | 75.331° E |
| 5 mins | 2026-06-23 06:38:28.548Z | 287.069° WNW | 2026-06-23 06:40:28.548Z | 358.899° N | 38.733° | 2026-06-23 06:43:28.548Z | 70.875° E |
| 5 mins | 2026-06-23 08:17:28.548Z | 294.453° NW | 2026-06-23 08:19:28.548Z | 354.574° N | 42.526° | 2026-06-23 08:22:28.548Z | 94.523° ESE |
| 5 mins | 2026-06-23 09:56:28.548Z | 264.567° W | 2026-06-23 09:58:28.548Z | 209.068° SW | 31.019° | 2026-06-23 10:01:28.548Z | 144.329° SSE |
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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