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: 2 days ago
TLE from 2 days ago
0 STARLINK-3173
1 51111U 22005H 26171.41531963 -.00000041 00000-0 15540-4 0 9992
2 51111 53.1585 187.8511 0001099 78.2935 281.8180 15.08829723244386Epoch: 2026-06-20T09:58Z
TLE epoch observation values (Epoch: 2026-06-20T09:58:03.616Z)
Latitude
0.00003°
Longitude
129.70578°
Altitude
540.51 km
Speed
7.593 km/s
True Right ascension
12h 31m 24s
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
21:37:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.789 km
Perigee altitude
539.269 km
Semi-major axis
6,918.166 km
Eccentricity
0.00011
Inclination
53.1585°
RAAN
187.8511°
Arg. of periapsis
78.2935°
True anomaly
281.80567°
Mean anomaly
281.818°
Eccentric anomaly
281.81184°
Mean motion
3.77187 °/min
Orbital period
95.44 mins
BSTAR
0.00001554
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-06-23 03:21:13.577Z | 240.26° WSW | 2026-06-23 03:23:13.577Z | 297.28° NW | 43.62° | 2026-06-23 03:27:13.577Z | 46.779° ENE |
| 4 mins | 2026-06-23 08:23:13.577Z | 355.647° N | 2026-06-23 08:24:13.577Z | 16.244° NNE | 20.618° | 2026-06-23 08:27:13.577Z | 70.916° E |
| 6 mins | 2026-06-23 10:02:13.577Z | 304.406° NW | 2026-06-23 10:04:13.577Z | 230.867° WSW | 44.381° | 2026-06-23 10:08:13.577Z | 136.013° SSE |
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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