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UFO 8 (USA 138), 25258

Orbit data source: Space-Track

UFO 8 (USA 138), 25258 is a payload satellite owned by USN PMW 146 (US) in GEO that was launched on Mon, 16 Mar 1998 UTC via an ATLAS II 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.

Not visible in the next 10 days

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/25258?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/25258?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

25258, 1998-016A

Orbit

GEO

Last TLE update

7 hours ago

Origin

United States Navy (US)

Manufacturer

Hughes

Mission

Non-operational Defense Communications

Bus & Motor

HS-601, R-4D-11-300

Mass

3,200 kg wet, ~1,350 kg dry

Launch date (UTC)

1998-03-16 (27 years ago)

Launch vehicle

ATLAS II

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Hex Poly + 2 Pan, 26.2 m

Radar Cross Section

69.760 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 7 hours ago

0 UFO 8 (USA 138)
1 25258U 98016A   25115.76920054 -.00000123  00000-0  00000+0 0  9999
2 25258  10.6261  25.1473 0004377 256.0158 284.1763  1.00398599 99395

Epoch: 2025-04-25T18:27Z

Definitive object data (Epoch: 2025-04-25T18:27:38.926Z)

Latitude

-0.04043°

Longitude

74.35923°

Altitude

35,746.058 km

Speed

3.076 km/s

True Right ascension

13h 41m 10s

True Declination

0° 02' 25"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

-10.24379°

Longitude

179.74792°

Altitude

35,736.604 km

Speed

3.077 km/s

Apparent Right ascension

20h 42m 45s

Apparent Declination

-13° 59' 53"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

08:42:58

Azimuth

0.126° NNE

Elevation

-64.082°

Doppler factor

Orbital elements

Apogee altitude

35,770.54 km

Perigee altitude

35,733.659 km

Semi-major axis

42,130.237 km

Eccentricity

0.0004377

Inclination

10.6261°

RAAN

25.1473°

Arg. of periapsis

256.0158°

True anomaly

284.12766°

Mean anomaly

284.1763°

Eccentric anomaly

284.15198°

Mean motion

0.25099 °/min

BSTAR

Unknown

Orbital period

1434.33 mins

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25258 neighbors

Authenticating...

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Other satellites on launch #16 in the year 1998 (1998-03-16 UTC)

ATLAS 2 CENTAUR R/B, 25259 (Decayed)

UFO 8 (USA 138) Visibility forecast

Observer location: undefined°, undefined°

UFO 8 (USA 138) is not visible in the next 10 days

Authenticating...

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Check out UFO 8 (USA 138), 25258 on other resources

View UFO 8 (USA 138), 25258 on NASA - NSSDCA Website

View UFO 8 (USA 138), 25258 on Heavens-Above

View UFO 8 (USA 138), 25258 on Keep Track

View UFO 8 (USA 138), 25258 on Celestrak

View UFO 8 (USA 138), 25258 on Gunter's Space Page

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