STARLINK-5735, 55603
Orbit data source: Space-Track
STARLINK-5735, 55603 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sun, 12 Feb 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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55603 intel report (Beta)
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Edit Public Description
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: 15 hours ago
TLE from 15 hours ago
0 STARLINK-5735
1 55603U 23020AL 25340.54169188 .00001335 00000-0 11386-3 0 9996
2 55603 43.0023 138.1321 0001235 276.4924 83.5778 15.02536883155052Epoch: 2025-12-06T13:00Z
TLE epoch observation values (Epoch: 2025-12-06T13:00:02.178Z)
Latitude
0°
Longitude
-132.44492°
Altitude
558.759 km
Speed
7.584 km/s
True Right ascension
09h 12m 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
02:07:46
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
561.857 km
Perigee altitude
560.143 km
Semi-major axis
6,939.137 km
Eccentricity
0.00012
Inclination
43.0023°
RAAN
138.1321°
Arg. of periapsis
276.4924°
True anomaly
83.59186°
Mean anomaly
83.5778°
Eccentric anomaly
83.58483°
Mean motion
3.75478 °/min
Orbital period
95.88 mins
BSTAR
0.00011386
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Other satellites on launch #20 in the year 2023 (2023-02-12 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-5735 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 | 2025-12-07 13:06:29.709Z | 195.138° SSW | 2025-12-07 13:09:29.709Z | 146.925° SSE | 21.297° | 2025-12-07 13:12:29.709Z | 95.786° ESE |
| 6 mins | 2025-12-07 14:47:29.709Z | 246.938° WSW | 2025-12-07 14:49:29.709Z | 234.482° WSW | 43.351° | 2025-12-07 14:53:29.709Z | 72.637° E |
| 6 mins | 2025-12-07 16:28:29.709Z | 288.488° WNW | 2025-12-07 16:30:29.709Z | 339.795° N | 38.966° | 2025-12-07 16:34:29.709Z | 75.736° E |
| 6 mins | 2025-12-07 18:09:29.709Z | 291.389° WNW | 2025-12-07 18:11:29.709Z | 332.046° NNW | 44.266° | 2025-12-07 18:15:29.709Z | 103.81° ESE |
| 6 mins | 2025-12-07 19:49:29.709Z | 266.21° W | 2025-12-07 19:52:29.709Z | 202.686° SW | 26.785° | 2025-12-07 19:55:29.709Z | 152.99° 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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