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USA 142, 25669

Orbit data source: Space-Track

USA 142, 25669 is a payload satellite owned by USAF SMC (US) in HEO that was launched on Fri, 09 Apr 1999 UTC via a TITAN 402B/IUS 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/25669?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/25669?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

25669, 1999-017A

Orbit

HEO

Country

Related business

United States Space Force (US)

Manufacturer

TRW

Mission

Non-operational Defense Early Warn

Bus & Motor

DSP B18, MRE-4

Mass

~2,360 kg wet, ~2,300 kg dry

Launch date (UTC)

1999-04-09 (27 years ago)

Launch vehicle

TITAN 402B/IUS

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + Cyl + 1 Pan, 5.8 m

Radar Cross Section

39.779 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 USA 142
1 25669U 99017A   26171.32935558 -.00000046  00000-0  45184-3 0  9997
2 25669  29.0097  64.0043 7099583 144.8184 294.4248  2.33045039 18365

Epoch: 2026-06-20T07:54Z

TLE epoch observation values (Epoch: 2026-06-20T07:54:16.322Z)

Latitude

0.00004°

Longitude

36.8692°

Altitude

22,047.652 km

Speed

3.385 km/s

True Right ascension

04h 15m 55s

True Declination

0° 00' 00"

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

23:08:24

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

34,720.028 km

Perigee altitude

592.899 km

Semi-major axis

24,034.601 km

Eccentricity

0.70996

Inclination

29.0097°

RAAN

64.0043°

Arg. of periapsis

144.8184°

True anomaly

215.14245°

Mean anomaly

294.4248°

Eccentric anomaly

255.11262°

Mean motion

0.58249 °/min

Orbital period

618.04 mins

BSTAR

0.00045184

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Other satellites on launch #17 in the year 1999 (1999-04-09 UTC)

TITAN 4 R/B, 25670 (Decayed)

USA 142 DEB, 25675 (Decayed)

USA 142 DEB, 25775

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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 142 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.
55 mins	2026-06-22 22:32:07.841Z	259.395° W	2026-06-22 23:21:07.841Z	194.113° SSW	37.764°	2026-06-22 23:27:07.841Z	121.348° SE
10 mins	2026-06-23 11:56:07.841Z	165.518° S	2026-06-23 12:06:07.841Z	165.153° S	11.208°	2026-06-23 12:06:07.841Z	165.153° S

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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 142, 25669 on other resources

View USA 142, 25669 on NASA - NSSDCA Website

View USA 142, 25669 on Heavens-Above

View USA 142, 25669 on Keep Track

View USA 142, 25669 on Celestrak

View USA 142, 25669 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 142, 25669

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T07:54:16.322Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #17 in the year 1999 (1999-04-09 UTC)

USA 142 Visibility forecast

Co-orbital & Co-planar RSOs

Check out USA 142, 25669 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago