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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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-3644
1 51987U 22025AH 26171.41668980 .00034165 00000-0 15384-2 0 9992
2 51987 53.1594 297.4043 0000922 93.7747 293.7414 15.20788069 5784Epoch: 2026-06-20T10:00Z
TLE epoch observation values (Epoch: 2026-06-20T10:00:01.998Z)
Latitude
21.74398°
Longitude
-103.94836°
Altitude
503.828 km
Speed
7.616 km/s
True Right ascension
20h 58m 45s
True Declination
21° 37' 18"
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
00:51:08
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
504.352 km
Perigee altitude
503.083 km
Semi-major axis
6,881.855 km
Eccentricity
0.00009
Inclination
53.1594°
RAAN
297.4043°
Arg. of periapsis
93.7747°
True anomaly
293.73173°
Mean anomaly
293.7414°
Eccentric anomaly
293.73656°
Mean motion
3.80176 °/min
Orbital period
94.69 mins
BSTAR
0.0015384
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-06-22 15:58:34.370Z | 359.766° N | 2026-06-22 15:59:34.370Z | 21.816° NNE | 19.992° | 2026-06-22 16:02:34.370Z | 74.665° E |
| 5 mins | 2026-06-22 17:36:34.370Z | 302.765° NW | 2026-06-22 17:38:34.370Z | 215.426° SW | 43.943° | 2026-06-22 17:41:34.370Z | 138.366° SSE |
| 5 mins | 2026-06-23 10:38:34.370Z | 248.918° W | 2026-06-23 10:40:34.370Z | 339.627° N | 41.67° | 2026-06-23 10:43:34.370Z | 43.188° NE |
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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