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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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Iframe URL

https://www.satcat.com/sats-embedded/55138?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

55138, 2022-144E

Orbit

GEO

Last TLE update

2 months ago

Origin

United States Space Force (US)

Manufacturer

Millenium ES

Mission

Non-operational Defense Technology

Bus & Motor

ALTAIR 27U, Unknown motor

Mass

~100 kg wet, ~100 kg dry

Launch date (UTC)

2022-11-01 (3 years ago)

Launch vehicle

FALCON HEAVY

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box, 0.3 m

Radar Cross Section

0.600 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 2 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  1470

Epoch: 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

Object was in daylight at epoch

Visualization orbit readout

Latitude

0.34782°

Longitude

138.7148°

Altitude

35,549.567 km

Speed

3.096 km/s

Apparent Right ascension

04h 52m 19s

Apparent Declination

-5° 49' 37"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

03:17:00

Azimuth

148.733° SSE

Elevation

39.261°

Doppler factor

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

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Other satellites on launch #144 in the year 2022 (2022-11-01 UTC)

LDPE-2, 54219

USA 339, 54220

FALCON HEAVY R/B, 54221

FALCON HEAVY DEB, 54222

USA 340 Visibility forecast

Observer location: undefined°, undefined°

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.
1440 mins	2025-07-31 13:39:45.534Z	148.744° SSE	2025-07-31 20:13:45.534Z	147.907° SSE	34.881°	2025-08-01 13:39:45.534Z	150.538° SSE

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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

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Authenticating...

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Check out USA 340, 55138 on other resources

View USA 340, 55138 on NASA - NSSDCA Website

View USA 340, 55138 on Heavens-Above

View USA 340, 55138 on Keep Track

View USA 340, 55138 on Celestrak

View USA 340, 55138 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.