STARLINK-2151, 48556
Orbit data source: Space-Track
STARLINK-2151, 48556 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sat, 15 May 2021 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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48556 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
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: 16 hours ago
TLE from 16 hours ago
0 STARLINK-2151
1 48556U 21041D 25349.77472882 .00001543 00000-0 12247-3 0 9996
2 48556 53.0547 158.3290 0001381 84.8650 275.2496 15.06400674252418Epoch: 2025-12-15T18:35Z
TLE epoch observation values (Epoch: 2025-12-15T18:35:36.570Z)
Latitude
-0.00005°
Longitude
154.75813°
Altitude
548.001 km
Speed
7.589 km/s
True Right ascension
10h 33m 18s
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
09:24:32
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
548.437 km
Perigee altitude
546.524 km
Semi-major axis
6,925.617 km
Eccentricity
0.00014
Inclination
53.0547°
RAAN
158.329°
Arg. of periapsis
84.865°
True anomaly
275.23384°
Mean anomaly
275.2496°
Eccentric anomaly
275.24172°
Mean motion
3.76578 °/min
Orbital period
95.6 mins
BSTAR
0.00012247
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Other satellites on launch #41 in the year 2021 (2021-05-15 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-2151 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 | 2025-12-16 13:51:40.918Z | 217.663° SW | 2025-12-16 13:55:40.918Z | 123.717° SE | 41.899° | 2025-12-16 13:58:40.918Z | 57.82° ENE |
| 5 mins | 2025-12-16 15:33:40.918Z | 298.758° NW | 2025-12-16 15:35:40.918Z | 343.168° N | 22.781° | 2025-12-16 15:38:40.918Z | 31.059° NE |
| 4 mins | 2025-12-16 18:55:40.918Z | 355.384° N | 2025-12-16 18:56:40.918Z | 13.545° NNE | 17.14° | 2025-12-16 18:59:40.918Z | 61.483° ENE |
| 6 mins | 2025-12-16 20:34:40.918Z | 320.759° NNW | 2025-12-16 20:36:40.918Z | 4.239° NNE | 40.88° | 2025-12-16 20:40:40.918Z | 118.514° SE |
| 4 mins | 2025-12-16 22:14:40.918Z | 259.706° W | 2025-12-16 22:16:40.918Z | 224.017° SW | 16.448° | 2025-12-16 22:18:40.918Z | 193.583° SSW |
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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