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USA 255, 40101

Orbit data source: Space-Track

USA 255, 40101 is a payload satellite owned by AFRL/RV (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/40101?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/40101?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

40101, 2014-043C

Orbit

GEO

Country

Related business

United States Air Force (US)

Manufacturer

OSC

Mission

Non-operational Defense Classified

Bus & Motor

ANGELS, AOCS

Mass

70 kg wet, 70 kg dry

Launch date (UTC)

2014-07-28 (12 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 + 1 Pan, 0.4 m

Radar Cross Section

0.375 m², Medium (>0.1 m² and < 1m²)

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Last TLE update: 1 day ago

TLE from 1 day ago

0 USA 255
1 40101U 14043C   26297.26548413 -.00000152  00000-0  00000-0 0  9996
2 40101   9.5376  55.9342 0011899 331.8914  48.1475  0.98726974 26585

Epoch: 2026-10-24T06:22Z

TLE epoch observation values (Epoch: 2026-10-24T06:22:17.828Z)

Latitude

3.26805°

Longitude

-52.46876°

Altitude

36,190.448 km

Speed

3.061 km/s

True Right ascension

05h 03m 07s

True Declination

3° 15' 53"

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

05:35:25

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

36,277.011 km

Perigee altitude

36,175.621 km

Semi-major axis

42,604.453 km

Eccentricity

0.00119

Inclination

9.5376°

RAAN

55.9342°

Arg. of periapsis

331.8914°

True anomaly

48.24917°

Mean anomaly

48.1475°

Eccentric anomaly

48.19832°

Mean motion

0.24681 °/min

Orbital period

1,458.62 mins

BSTAR

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Computing Atmospheric mass density...

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

USA 253, 40099

USA 254, 40100

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 255 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	2026-10-25 10:20:36.411Z	113.856° SE	2026-10-26 10:20:36.411Z	119.324° SE	35.442°	2026-10-26 10:20:36.411Z	119.324° SE

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40101 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 255, 40101 on other resources

View USA 255, 40101 on NASA - NSSDCA Website

View USA 255, 40101 on Heavens-Above

View USA 255, 40101 on Keep Track

View USA 255, 40101 on Celestrak

View USA 255, 40101 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 255, 40101

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: 2026-10-24T06:22:17.828Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

USA 255 Visibility forecast

40101 neighbors

Co-orbital & Co-planar RSOs

Check out USA 255, 40101 on other resources

Documentation

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