STARLINK-3618, 51998
Orbit data source: Space-Track
STARLINK-3618, 51998 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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51998 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-3618
1 51998U 22025AU 26171.43647270 -.00000062 00000-0 14177-4 0 9996
2 51998 53.1593 277.7559 0001029 75.1304 284.9802 15.08835178236431Epoch: 2026-06-20T10:28Z
TLE epoch observation values (Epoch: 2026-06-20T10:28:31.241Z)
Latitude
0.00004°
Longitude
-148.02536°
Altitude
540.465 km
Speed
7.593 km/s
True Right ascension
18h 31m 01s
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
21:34:57
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.724 km
Perigee altitude
539.3 km
Semi-major axis
6,918.149 km
Eccentricity
0.0001
Inclination
53.1593°
RAAN
277.7559°
Arg. of periapsis
75.1304°
True anomaly
284.96881°
Mean anomaly
284.9802°
Eccentric anomaly
284.9745°
Mean motion
3.77188 °/min
Orbital period
95.44 mins
BSTAR
0.000014177
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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-3618 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 12:04:55.813Z | 319.913° NNW | 2026-06-22 12:06:55.813Z | 350.179° N | 13.426° | 2026-06-22 12:08:55.813Z | 20.537° NNE |
| 5 mins | 2026-06-22 15:25:55.813Z | 336.868° NNW | 2026-06-22 15:27:55.813Z | 32.739° NE | 32.874° | 2026-06-22 15:30:55.813Z | 98.578° ESE |
| 5 mins | 2026-06-22 17:04:55.813Z | 277.69° WNW | 2026-06-22 17:06:55.813Z | 235.82° WSW | 25.898° | 2026-06-22 17:09:55.813Z | 174.674° S |
| 6 mins | 2026-06-23 08:35:55.813Z | 202.948° SW | 2026-06-23 08:38:55.813Z | 110.426° ESE | 36.217° | 2026-06-23 08:41:55.813Z | 61.276° ENE |
| 5 mins | 2026-06-23 10:15:55.813Z | 286.906° WNW | 2026-06-23 10:17:55.813Z | 331.055° NNW | 25.342° | 2026-06-23 10:20:55.813Z | 28.374° 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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