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NORAD 23908

USA 121

📡 Radar viewIn orbit
Tap to zoom and pan
Computing position…
Blue circle: where it is above the horizon now

Time

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Position

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Longitude
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Altitude
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Speed

Miles per hour
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Kilometers per second
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Miles per second
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From your location

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Right ascension
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Local sidereal time
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Sunlight

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Its orbit in 3D

Goes round Earth once every 107 minutes, on an orbit tilted 63.3° from the equator, between 396 and 2,071 km up. Earth is drawn to scale.

Drag to turn · pinch to zoom · it moves live

About USA 121

USA 121 is a satellite from the United States, launched on May 12, 1996 from Air Force Western Test Range.

It circles Earth every 107 minutes (13.5 times a day), between 444 and 1,725 km up, on an orbit tilted 63.3° to the equator, so its path covers latitudes up to 63° north and south.

The map shows where it is right now; the pass list tells you when it next comes over your location.

Parcae 13C · American military ocean surveillance and SIGINT satellite

Operated by
National Reconnaissance Office, United States Navy
Built by
Lockheed Corporation, Martin Marietta

Names and facts: Wikidata (CC0).

Orbit height over the past year

Over the last 21 days its lowest point went from 445 km to 444 km. Sudden rises are engine burns that lift the orbit; slow declines are drag from the thin upper atmosphere.

Lowest point (perigee)Highest point (apogee)
5001,0001,500

From Space-Track element sets, one point a day.