STARLINK-5820, 55781
Orbit data source: Space-Track
STARLINK-5820, 55781 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Fri, 03 Mar 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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55781 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-5820
1 55781U 23028AS 26171.42127362 -.00000100 00000-0 -61071-6 0 9999
2 55781 69.9995 325.3716 0002914 268.1224 91.9601 14.98328611181923Epoch: 2026-06-20T10:06Z
TLE epoch observation values (Epoch: 2026-06-20T10:06:38.040Z)
Latitude
-0.00007°
Longitude
-94.92307°
Altitude
574.554 km
Speed
7.574 km/s
True Right ascension
21h 41m 29s
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
00:39:43
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
572.033 km
Perigee altitude
567.984 km
Semi-major axis
6,948.145 km
Eccentricity
0.00029
Inclination
69.9995°
RAAN
325.3716°
Arg. of periapsis
268.1224°
True anomaly
91.99347°
Mean anomaly
91.9601°
Eccentric anomaly
91.97679°
Mean motion
3.74748 °/min
Orbital period
96.06 mins
BSTAR
-6.1071e-7
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Other satellites on launch #28 in the year 2023 (2023-03-03 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-5820 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 | 2026-06-22 20:20:11.281Z | 0.481° NNE | 2026-06-22 20:23:11.281Z | 62.236° ENE | 28.882° | 2026-06-22 20:26:11.281Z | 120.055° SE |
| 4 mins | 2026-06-22 21:59:11.281Z | 290.087° WNW | 2026-06-22 22:01:11.281Z | 255.036° W | 18.543° | 2026-06-22 22:03:11.281Z | 220.351° SW |
| 5 mins | 2026-06-23 10:21:11.281Z | 144.53° SSE | 2026-06-23 10:23:11.281Z | 106.814° ESE | 21.415° | 2026-06-23 10:26:11.281Z | 56.212° ENE |
| 5 mins | 2026-06-23 11:59:11.281Z | 254.734° W | 2026-06-23 12:01:11.281Z | 295.917° NW | 25.622° | 2026-06-23 12:04:11.281Z | 355.389° N |
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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