STARLINK-1255, 45399
Orbit data source: Space-Track
STARLINK-1255, 45399 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 18 Mar 2020 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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45399 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Partially operational Commercial Communications
Bus & Motor
STARLINK, Unknown motor
Mass
260 kg wet, ~248 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: 11 hours ago
TLE from 11 hours ago
0 STARLINK-1255
1 45399U 20019AR 25363.46595486 .00097936 00000-0 23715-2 0 9992
2 45399 53.0468 77.5305 0002241 46.7733 313.3458 15.40320118319571Epoch: 2025-12-29T11:10Z
TLE epoch observation values (Epoch: 2025-12-29T11:10:58.499Z)
Latitude
-0.00001°
Longitude
171.62357°
Altitude
445.006 km
Speed
7.647 km/s
True Right ascension
05h 10m 07s
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
21:20:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
446.969 km
Perigee altitude
443.911 km
Semi-major axis
6,823.577 km
Eccentricity
0.00022
Inclination
53.0468°
RAAN
77.5305°
Arg. of periapsis
46.7733°
True anomaly
313.32712°
Mean anomaly
313.3458°
Eccentric anomaly
313.33646°
Mean motion
3.85057 °/min
Orbital period
93.49 mins
BSTAR
0.0023715
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Other satellites on launch #19 in the year 2020 (2020-03-18 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-1255 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 | 2025-12-30 07:35:45.324Z | 217.469° SW | 2025-12-30 07:38:45.324Z | 141.691° SSE | 41.729° | 2025-12-30 07:41:45.324Z | 57.18° ENE |
| 4 mins | 2025-12-30 09:14:45.324Z | 300.091° NW | 2025-12-30 09:16:45.324Z | 346.238° N | 18.871° | 2025-12-30 09:18:45.324Z | 22.847° NE |
| 5 mins | 2025-12-30 14:08:45.324Z | 324.246° NNW | 2025-12-30 14:10:45.324Z | 14.518° NNE | 37.183° | 2025-12-30 14:13:45.324Z | 110.251° ESE |
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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