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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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-5735
1 55603U 23020AL 26171.29644382 .00000474 00000-0 26743-4 0 9992
2 55603 43.0031 134.5986 0001718 272.2259 87.8396 15.27580040184730Epoch: 2026-06-20T07:06Z
TLE epoch observation values (Epoch: 2026-06-20T07:06:52.746Z)
Latitude
0°
Longitude
119.36573°
Altitude
482.781 km
Speed
7.626 km/s
True Right ascension
08h 58m 23s
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
21:54:18
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
486.173 km
Perigee altitude
483.815 km
Semi-major axis
6,863.131 km
Eccentricity
0.00017
Inclination
43.0031°
RAAN
134.5986°
Arg. of periapsis
272.2259°
True anomaly
87.85927°
Mean anomaly
87.8396°
Eccentric anomaly
87.84944°
Mean motion
3.81733 °/min
Orbital period
94.31 mins
BSTAR
0.000026743
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-06-22 23:39:13.518Z | 200.892° SSW | 2026-06-22 23:41:13.518Z | 161.915° S | 24.691° | 2026-06-22 23:44:13.518Z | 93.962° ESE |
| 5 mins | 2026-06-23 01:18:13.518Z | 259.26° W | 2026-06-23 01:20:13.518Z | 301.656° NW | 43.973° | 2026-06-23 01:23:13.518Z | 69.839° E |
| 6 mins | 2026-06-23 02:57:13.518Z | 291.106° WNW | 2026-06-23 02:59:13.518Z | 337.945° N | 37.047° | 2026-06-23 03:03:13.518Z | 79.264° E |
| 6 mins | 2026-06-23 04:36:13.518Z | 287.258° WNW | 2026-06-23 04:39:13.518Z | 118.469° SE | 42.268° | 2026-06-23 04:42:13.518Z | 111.269° ESE |
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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