STARLINK-5878, 55955
Orbit data source: Space-Track
STARLINK-5878, 55955 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Fri, 17 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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55955 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: 3 days ago
TLE from 3 days ago
0 STARLINK-5878
1 55955U 23037AT 26170.90852471 .00000317 00000-0 34364-4 0 9991
2 55955 69.9997 6.7650 0002899 267.6503 92.4325 14.98333898179784Epoch: 2026-06-19T21:48Z
TLE epoch observation values (Epoch: 2026-06-19T21:48:16.534Z)
Latitude
0.00003°
Longitude
131.56537°
Altitude
574.554 km
Speed
7.574 km/s
True Right ascension
00h 27m 03s
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
21:29:21
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
572.006 km
Perigee altitude
567.978 km
Semi-major axis
6,948.129 km
Eccentricity
0.00029
Inclination
69.9997°
RAAN
6.765°
Arg. of periapsis
267.6503°
True anomaly
92.46569°
Mean anomaly
92.4325°
Eccentric anomaly
92.44909°
Mean motion
3.7475 °/min
Orbital period
96.06 mins
BSTAR
0.000034364
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Other satellites on launch #37 in the year 2023 (2023-03-17 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-5878 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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-06-22 14:01:20.554Z | 200.445° SSW | 2026-06-22 14:05:20.554Z | 49.48° ENE | 44.062° | 2026-06-22 14:08:20.554Z | 26.341° NE |
| 5 mins | 2026-06-22 22:26:20.554Z | 13.453° NNE | 2026-06-22 22:29:20.554Z | 60.032° ENE | 15.987° | 2026-06-22 22:31:20.554Z | 90.406° ESE |
| 6 mins | 2026-06-23 00:05:20.554Z | 309.901° NW | 2026-06-23 00:07:20.554Z | 257.543° W | 34.801° | 2026-06-23 00:11:20.554Z | 178.969° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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