OrbitNight

NORAD 9803

OPS 3151

📡 Radar viewIn orbit
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Computing position…
Blue circle: where it is above the horizon now

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Its orbit in 3D

Goes round Earth once every 24.6 hours, on an orbit tilted 4.4° from the equator, between 35,892 and 37,272 km up. Earth is drawn to scale.

Drag to turn · pinch to zoom · it moves live

About OPS 3151

OPS 3151 is a satellite from the United States, launched on Feb 6, 1977 from Air Force Eastern Test Range.

It sits in geostationary orbit about 35,800 km above the equator near 156°W, turning with Earth so it stays over the same spot.

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

DSP F7 · These Defense Support System satellites were the space-based segment of a 2-tiered ballistic missile launch detection and warning system.

Names and facts: Wikidata (CC0).

Orbit height over the past year

Over the last 13 days its lowest point went from 36,238 km to 36,238 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)
36,20036,40036,60036,800

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