STARLINK-3173, 51111
Orbit data source: Space-Track
STARLINK-3173, 51111 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 19 Jan 2022 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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51111 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
297 kg wet, ~275 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-3173
1 51111U 22005H 26094.24563695 -.00001908 00000-0 -10188-3 0 9990
2 51111 53.2157 174.3968 0001369 108.7986 251.3155 15.08821900232733Epoch: 2026-04-04T05:53Z
TLE epoch observation values (Epoch: 2026-04-04T05:53:43.032Z)
Latitude
0°
Longitude
-106.60067°
Altitude
540.999 km
Speed
7.593 km/s
True Right ascension
11h 37m 35s
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
22:49:03
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.991 km
Perigee altitude
539.097 km
Semi-major axis
6,918.181 km
Eccentricity
0.00014
Inclination
53.2157°
RAAN
174.3968°
Arg. of periapsis
108.7986°
True anomaly
251.30064°
Mean anomaly
251.3155°
Eccentric anomaly
251.30807°
Mean motion
3.77186 °/min
Orbital period
95.44 mins
BSTAR
-0.00010188
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Other satellites on launch #5 in the year 2022 (2022-01-19 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-3173 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 | 2026-04-05 07:29:25.995Z | 210.894° SW | 2026-04-05 07:33:25.995Z | 109.579° ESE | 37.658° | 2026-04-05 07:36:25.995Z | 60.039° ENE |
| 5 mins | 2026-04-05 09:10:25.995Z | 287.745° WNW | 2026-04-05 09:12:25.995Z | 330.035° NNW | 24.473° | 2026-04-05 09:15:25.995Z | 27.267° NE |
| 6 mins | 2026-04-05 14:11:25.995Z | 326.443° NNW | 2026-04-05 14:13:25.995Z | 12.991° NNE | 37.319° | 2026-04-05 14:17:25.995Z | 111.724° ESE |
| 4 mins | 2026-04-05 15:51:25.995Z | 261.041° W | 2026-04-05 15:52:25.995Z | 241.633° WSW | 19.742° | 2026-04-05 15:55:25.995Z | 186.996° 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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