STARLINK-5276, 55399
Orbit data source: Space-Track
STARLINK-5276, 55399 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Tue, 31 Jan 2023 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). 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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55399 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
13.562 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 STARLINK-5276
1 55399U 23014J 26171.40689632 .00000190 00000-0 23749-4 0 9995
2 55399 69.9994 165.3793 0003692 267.9507 92.1230 14.98330178187444Epoch: 2026-06-20T09:45Z
TLE epoch observation values (Epoch: 2026-06-20T09:45:55.842Z)
Latitude
0.00007°
Longitude
110.27468°
Altitude
574.575 km
Speed
7.574 km/s
True Right ascension
11h 01m 31s
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
21:32:28
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
572.569 km
Perigee altitude
567.438 km
Semi-major axis
6,948.141 km
Eccentricity
0.00037
Inclination
69.9994°
RAAN
165.3793°
Arg. of periapsis
267.9507°
True anomaly
92.16528°
Mean anomaly
92.123°
Eccentric anomaly
92.14414°
Mean motion
3.74749 °/min
Orbital period
96.06 mins
BSTAR
0.000023749
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Other satellites on launch #14 in the year 2023 (2023-01-31 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-5276 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 | 2026-06-23 00:23:27.540Z | 186.913° SSW | 2026-06-23 00:26:27.540Z | 101.829° ESE | 40.912° | 2026-06-23 00:29:27.540Z | 34.688° NE |
| 4 mins | 2026-06-23 10:26:27.540Z | 322.08° NNW | 2026-06-23 10:28:27.540Z | 276.229° WNW | 40.469° | 2026-06-23 10:30:27.540Z | 181.542° SSW |
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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