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USA 75, 21805

Orbit data source: Space-Track

USA 75, 21805 is a payload satellite owned by USAF SSD (US) in GEO that was launched on Sun, 24 Nov 1991 UTC via an SPACE SHUTTLE 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/21805?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/21805?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21805, 1991-080B

Orbit

GEO

Last TLE update

2 days ago

Origin

United States Air Force (US)

Manufacturer

TRW

Mission

Partially operational Defense Early Warn

Bus & Motor

DSP B14, MRE-4

Mass

2,360 kg wet, ~2,200 kg dry

Launch date (UTC)

1991-11-24 (33 years ago)

Launch vehicle

SPACE SHUTTLE

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl + 1 Pan, 11.5 m

Radar Cross Section

31.528 m²

Expand to show TLE details & history

TLE from 2 days ago

0 USA 75
1 21805U 91080B   25124.41668399 -.00000267  00000-0  00000+0 0  9999
2 21805  14.2258 348.4297 0004908  90.4786  98.3952  0.99190664 21656

Epoch: 2025-05-04T10:00Z

Definitive object data (Epoch: 2025-05-04T10:00:01.496Z)

Latitude

-2.20128°

Longitude

164.56119°

Altitude

36,095.451 km

Speed

3.063 km/s

True Right ascension

11h 48m 26s

True Declination

-2° 11' 57"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

13.35059°

Longitude

45.13494°

Altitude

36,071.812 km

Speed

3.065 km/s

Apparent Right ascension

03h 24m 17s

Apparent Declination

7° 43' 14"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

10:19:49

Azimuth

284.88° WNW

Elevation

-5.518°

Doppler factor

Orbital elements

Apogee altitude

36,114.236 km

Perigee altitude

36,072.546 km

Semi-major axis

42,471.528 km

Eccentricity

0.0004908

Inclination

14.2258°

RAAN

348.4297°

Arg. of periapsis

90.4786°

True anomaly

98.45083°

Mean anomaly

98.3952°

Eccentric anomaly

98.42302°

Mean motion

0.24797 °/min

BSTAR

Unknown

Orbital period

1451.8 mins

Loading historical data...

21805 neighbors

Authenticating...

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Other satellites on launch #80 in the year 1991 (1991-11-24 UTC)

STS 44, 21795 (Decayed)

IUS R/B(1), 21806

IUS R/B(2), 21807

USA 75 Visibility forecast

Observer location: undefined°, undefined°

USA 75 is not visible in the next 10 days

Authenticating...

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Check out USA 75, 21805 on other resources

View USA 75, 21805 on NASA - NSSDCA Website

View USA 75, 21805 on Heavens-Above

View USA 75, 21805 on Keep Track

View USA 75, 21805 on Celestrak

View USA 75, 21805 on Gunter's Space Page

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