STARLINK-3639, 51789
Orbit data source: Space-Track
STARLINK-3639, 51789 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Fri, 25 Feb 2022 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). 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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51789 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-3639
1 51789U 22017X 26171.39876316 -.00000107 00000-0 11373-4 0 9990
2 51789 53.1604 247.9268 0001376 88.9384 271.1765 15.08830212237782Epoch: 2026-06-20T09:34Z
TLE epoch observation values (Epoch: 2026-06-20T09:34:13.137Z)
Latitude
-0°
Longitude
-164.24189°
Altitude
540.645 km
Speed
7.593 km/s
True Right ascension
16h 31m 42s
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
21:30:06
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.979 km
Perigee altitude
539.075 km
Semi-major axis
6,918.164 km
Eccentricity
0.00014
Inclination
53.1604°
RAAN
247.9268°
Arg. of periapsis
88.9384°
True anomaly
271.16074°
Mean anomaly
271.1765°
Eccentric anomaly
271.16862°
Mean motion
3.77187 °/min
Orbital period
95.44 mins
BSTAR
0.000011373
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Other satellites on launch #17 in the year 2022 (2022-02-25 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-3639 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 | 2026-06-22 12:55:06.027Z | 349.304° N | 2026-06-22 12:57:06.027Z | 35.314° NE | 23.377° | 2026-06-22 13:00:06.027Z | 83.732° E |
| 6 mins | 2026-06-22 14:34:06.027Z | 295.312° NW | 2026-06-22 14:36:06.027Z | 240.841° WSW | 40.022° | 2026-06-22 14:40:06.027Z | 145.668° SSE |
| 4 mins | 2026-06-23 06:06:06.027Z | 164.571° S | 2026-06-23 06:08:06.027Z | 118.886° SE | 22.783° | 2026-06-23 06:10:06.027Z | 82.499° E |
| 6 mins | 2026-06-23 07:44:06.027Z | 258.884° W | 2026-06-23 07:47:06.027Z | 339.114° N | 34.958° | 2026-06-23 07:50:06.027Z | 37.074° NE |
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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