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: 8 hours ago
TLE from 8 hours ago
0 STARLINK-3177
1 51138U 22005AL 26094.29255476 .00000731 00000-0 64048-4 0 9995
2 51138 53.2169 184.1805 0001701 94.6957 265.4230 15.08835042232591Epoch: 2026-04-04T07:01Z
TLE epoch observation values (Epoch: 2026-04-04T07:01:16.731Z)
Latitude
0.00003°
Longitude
-113.75361°
Altitude
540.75 km
Speed
7.593 km/s
True Right ascension
12h 16m 43s
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
20:30:10
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
541.18 km
Perigee altitude
538.827 km
Semi-major axis
6,918.141 km
Eccentricity
0.00017
Inclination
53.2169°
RAAN
184.1805°
Arg. of periapsis
94.6957°
True anomaly
265.40357°
Mean anomaly
265.423°
Eccentric anomaly
265.41329°
Mean motion
3.77189 °/min
Orbital period
95.44 mins
BSTAR
0.000064048
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-04-04 15:27:56.115Z | 315.105° NNW | 2026-04-04 15:30:56.115Z | 1.713° NNE | 42.477° | 2026-04-04 15:34:56.115Z | 122.447° SE |
| 6 mins | 2026-04-05 08:38:56.115Z | 232.253° WSW | 2026-04-05 08:41:56.115Z | 24.481° NE | 44.17° | 2026-04-05 08:44:56.115Z | 48.335° ENE |
| 4 mins | 2026-04-05 10:19:56.115Z | 308.854° NW | 2026-04-05 10:21:56.115Z | 347.817° N | 18.526° | 2026-04-05 10:23:56.115Z | 20.876° NNE |
| 4 mins | 2026-04-05 13:40:56.115Z | 347.434° N | 2026-04-05 13:42:56.115Z | 25.816° NE | 19.327° | 2026-04-05 13:44:56.115Z | 61.566° ENE |
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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