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USA 254, 40100

Orbit data source: Space-Track

USA 254, 40100 is a payload satellite owned by USAF AFSPC (US) in GEO that was launched on Mon, 28 Jul 2014 UTC via a DELTA 4M+(4,2) 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 src="https://www.satcat.com/sats-embedded/40100?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/40100?theme=dark&initialShowStats=false

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Identifier

40100, 2014-043B

Orbit

GEO

Country

Related business

United States Air Force (US)

Manufacturer

OSC

Mission

Non-operational Defense Classified

Bus & Motor

GEOSTAR-1, AOCS

Mass

500 kg wet, 500 kg dry

Launch date (UTC)

2014-07-28 (11 years ago)

Launch vehicle

DELTA 4M+(4,2)

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 2.5 m

Radar Cross Section

7.621 m²

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Last TLE update: 1 day ago

TLE from 1 day ago

0 USA 254
1 40100U 14043B   25342.75275122  .00000062  00000-0  00000+0 0  9991
2 40100   4.2231  78.5261 0002878 214.6856 273.7669  0.99128880 25681

Epoch: 2025-12-08T18:03Z

TLE epoch observation values (Epoch: 2025-12-08T18:03:57.705Z)

Latitude

3.29774°

Longitude

-141.71396°

Altitude

36,108.352 km

Speed

3.063 km/s

True Right ascension

13h 48m 05s

True Declination

3° 17' 40"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

19:19:48

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

36,123.35 km

Perigee altitude

36,098.893 km

Semi-major axis

42,489.258 km

Eccentricity

0.00029

Inclination

4.2231°

RAAN

78.5261°

Arg. of periapsis

214.6856°

True anomaly

273.73399°

Mean anomaly

273.7669°

Eccentric anomaly

273.75045°

Mean motion

0.24781 °/min

Orbital period

1,452.71 mins

BSTAR

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Other satellites on launch #43 in the year 2014 (2014-07-28 UTC)

USA 255, 40101

USA 253, 40099

DELTA 4 R/B, 40102

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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.

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USA 254 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.
1440 mins	2025-12-09 21:04:51.062Z	234.373° WSW	2025-12-10 15:31:51.062Z	240.202° WSW	25.737°	2025-12-10 21:04:51.062Z	238.386° WSW

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40100 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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out USA 254, 40100 on other resources

View USA 254, 40100 on NASA - NSSDCA Website

View USA 254, 40100 on Heavens-Above

View USA 254, 40100 on Keep Track

View USA 254, 40100 on Celestrak

View USA 254, 40100 on Gunter's Space Page

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

USA 254, 40100

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2025-12-08T18:03:57.705Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #43 in the year 2014 (2014-07-28 UTC)

USA 254 Visibility forecast

40100 neighbors

Co-orbital & Co-planar RSOs

Check out USA 254, 40100 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago