STARLINK-2141, 47731
Orbit data source: Space-Track
STARLINK-2141, 47731 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Thu, 04 Mar 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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47731 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: 9 hours ago
TLE from 9 hours ago
0 STARLINK-2141
1 47731U 21017K 25347.01858305 .00006223 00000-0 43628-3 0 9993
2 47731 53.0537 240.7002 0001254 111.2462 248.8661 15.06400279264675Epoch: 2025-12-13T00:26Z
TLE epoch observation values (Epoch: 2025-12-13T00:26:45.575Z)
Latitude
-0.00002°
Longitude
152.05841°
Altitude
548.403 km
Speed
7.589 km/s
True Right ascension
16h 02m 48s
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
07:26:33
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
548.35 km
Perigee altitude
546.613 km
Semi-major axis
6,925.619 km
Eccentricity
0.00013
Inclination
53.0537°
RAAN
240.7002°
Arg. of periapsis
111.2462°
True anomaly
248.8527°
Mean anomaly
248.8661°
Eccentric anomaly
248.8594°
Mean motion
3.76578 °/min
Orbital period
95.6 mins
BSTAR
0.00043628
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Other satellites on launch #17 in the year 2021 (2021-03-04 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-2141 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 | 2025-12-13 19:43:49.072Z | 224.544° SW | 2025-12-13 19:46:49.072Z | 193.743° SSW | 43.828° | 2025-12-13 19:50:49.072Z | 52.372° ENE |
| 5 mins | 2025-12-13 21:24:49.072Z | 295.521° NW | 2025-12-13 21:26:49.072Z | 332.243° NNW | 20.799° | 2025-12-13 21:29:49.072Z | 25.379° NE |
| 4 mins | 2025-12-14 00:46:49.072Z | 347.126° N | 2025-12-14 00:48:49.072Z | 24.328° NE | 18.624° | 2025-12-14 00:50:49.072Z | 58.855° ENE |
| 6 mins | 2025-12-14 02:25:49.072Z | 313.477° NW | 2025-12-14 02:28:49.072Z | 70.609° E | 44.258° | 2025-12-14 02:31:49.072Z | 125.228° SE |
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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