STARLINK-3644, 51987
Orbit data source: Space-Track
STARLINK-3644, 51987 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 09 Mar 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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51987 intel report (Beta)
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Edit Public Description
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-3644
1 51987U 22025AH 25346.94020481 -.00000708 00000-0 -26416-4 0 9999
2 51987 53.2194 68.5556 0001404 90.8178 269.2975 15.08833272207966Epoch: 2025-12-12T22:33Z
TLE epoch observation values (Epoch: 2025-12-12T22:33:53.695Z)
Latitude
-0.00003°
Longitude
8.20723°
Altitude
540.674 km
Speed
7.593 km/s
True Right ascension
04h 34m 13s
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
05:22:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.98 km
Perigee altitude
539.037 km
Semi-major axis
6,918.146 km
Eccentricity
0.00014
Inclination
53.2194°
RAAN
68.5556°
Arg. of periapsis
90.8178°
True anomaly
269.28141°
Mean anomaly
269.2975°
Eccentric anomaly
269.28946°
Mean motion
3.77189 °/min
Orbital period
95.44 mins
BSTAR
-0.000026416
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Other satellites on launch #25 in the year 2022 (2022-03-09 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-3644 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 | 2025-12-13 08:16:03.617Z | 220.091° SW | 2025-12-13 08:20:03.617Z | 104.766° ESE | 42.63° | 2025-12-13 08:23:03.617Z | 55.242° ENE |
| 4 mins | 2025-12-13 09:58:03.617Z | 305.332° NW | 2025-12-13 09:59:03.617Z | 326.285° NNW | 21.444° | 2025-12-13 10:02:03.617Z | 23.279° NE |
| 4 mins | 2025-12-13 13:19:03.617Z | 349.623° N | 2025-12-13 13:21:03.617Z | 25.762° NE | 16.811° | 2025-12-13 13:23:03.617Z | 57.661° ENE |
| 6 mins | 2025-12-13 14:58:03.617Z | 319.201° NNW | 2025-12-13 15:01:03.617Z | 74.498° E | 41.053° | 2025-12-13 15:04:03.617Z | 119.276° SE |
| 4 mins | 2025-12-13 16:38:03.617Z | 259.752° W | 2025-12-13 16:40:03.617Z | 224.77° SW | 15.673° | 2025-12-13 16:42:03.617Z | 194.73° SSW |
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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