USA 340, 55138
Orbit data source: Space-Track
USA 340, 55138 is an American payload satellite in GEO that was launched on Tue, 01 Nov 2022 UTC via an FALCON HEAVY 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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55138 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
Millenium ES
Mission
Non-operational Defense Technology
Bus & Motor
ALTAIR 27U, Unknown motor
Mass
~100 kg wet, ~100 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box, 0.3 m
Radar Cross Section
0.600 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 6 months ago
TLE from 6 months ago
0 USA 340
1 55138U 22144E 25163.08611111 -.00000216 00000-0 00000-0 0 9991
2 55138 4.4734 66.2414 0161279 302.5041 261.4999 0.99919047 8039Epoch: 2025-06-12T02:03Z
TLE epoch observation values (Epoch: 2025-06-12T02:03:59.999Z)
Latitude
-1.71587°
Longitude
-23.28822°
Altitude
35,998.48 km
Speed
3.063 km/s
True Right ascension
17h 53m 29s
True Declination
-1° 42' 51"
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
09:17:36
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
36,568.475 km
Perigee altitude
35,205.185 km
Semi-major axis
42,264.967 km
Eccentricity
0.01613
Inclination
4.4734°
RAAN
66.2414°
Arg. of periapsis
302.5041°
True anomaly
259.67782°
Mean anomaly
261.4999°
Eccentric anomaly
260.58828°
Mean motion
0.24979 °/min
Orbital period
1,441.22 mins
BSTAR
0
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Other satellites on launch #144 in the year 2022 (2022-11-01 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.USA 340 Visibility
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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. |
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| USA 340 is likely not visible in the next few days. |
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55138 neighbors
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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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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
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