STARLINK-3177, 51138
Orbit data source: Space-Track
STARLINK-3177, 51138 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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51138 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-3177
1 51138U 22005AL 26171.39446458 .00012407 00000-0 78935-3 0 9996
2 51138 53.1704 197.9456 0001253 62.8577 297.2542 15.09159894244234Epoch: 2026-06-20T09:28Z
TLE epoch observation values (Epoch: 2026-06-20T09:28:01.739Z)
Latitude
-0.00006°
Longitude
147.32859°
Altitude
539.262 km
Speed
7.594 km/s
True Right ascension
13h 11m 46s
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
23:19:30
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
539.885 km
Perigee altitude
538.152 km
Semi-major axis
6,917.155 km
Eccentricity
0.00013
Inclination
53.1704°
RAAN
197.9456°
Arg. of periapsis
62.8577°
True anomaly
297.24143°
Mean anomaly
297.2542°
Eccentric anomaly
297.24782°
Mean motion
3.7727 °/min
Orbital period
95.42 mins
BSTAR
0.00078935
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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-3177 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 | 2026-06-23 02:47:11.610Z | 177.606° S | 2026-06-23 02:50:11.610Z | 118.188° SE | 22.357° | 2026-06-23 02:52:11.610Z | 82.432° E |
| 6 mins | 2026-06-23 04:26:11.610Z | 258.788° W | 2026-06-23 04:29:11.610Z | 342.312° N | 35.017° | 2026-06-23 04:32:11.610Z | 37.667° NE |
| 5 mins | 2026-06-23 09:28:11.610Z | 343.961° N | 2026-06-23 09:30:11.610Z | 31.998° NE | 26.451° | 2026-06-23 09:33:11.610Z | 87.566° E |
| 6 mins | 2026-06-23 11:07:11.610Z | 288.867° WNW | 2026-06-23 11:09:11.610Z | 240.723° WSW | 34.828° | 2026-06-23 11:13:11.610Z | 153.892° 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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