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: 13 hours ago
TLE from 13 hours ago
0 STARLINK-1255
1 45399U 20019AR 25342.94026206 .00072548 00000-0 20686-2 0 9997
2 45399 53.0470 174.3588 0008132 138.2223 221.9401 15.35401692316412Epoch: 2025-12-08T22:33Z
TLE epoch observation values (Epoch: 2025-12-08T22:33:58.641Z)
Latitude
-0.00002°
Longitude
117.93236°
Altitude
464.755 km
Speed
7.633 km/s
True Right ascension
11h 37m 26s
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
10:03:16
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
465.564 km
Perigee altitude
454.442 km
Semi-major axis
6,838.14 km
Eccentricity
0.00081
Inclination
53.047°
RAAN
174.3588°
Arg. of periapsis
138.2223°
True anomaly
221.87787°
Mean anomaly
221.9401°
Eccentric anomaly
221.90898°
Mean motion
3.83828 °/min
Orbital period
93.79 mins
BSTAR
0.0020686
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2025-12-09 15:57:49.960Z | 247.411° WSW | 2025-12-09 15:59:49.960Z | 4.213° NNE | 40.792° | 2025-12-09 16:02:49.960Z | 45.301° ENE |
| 5 mins | 2025-12-09 22:30:49.960Z | 306.512° NW | 2025-12-09 22:32:49.960Z | 272.618° WNW | 44.05° | 2025-12-09 22:35:49.960Z | 135.001° 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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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
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