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NORAD 28230

GP-B

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

Time

Local time
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Position

Latitude
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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

Azimuth
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Elevation
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Right ascension
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Declination
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Local sidereal time
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Sunlight

Day / night
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Its orbit in 3D

Goes round Earth once every 97 minutes, on an orbit tilted 89.9° from the equator, between 616 and 635 km up. Earth is drawn to scale.

Drag to turn · pinch to zoom · it moves live

About GP-B

GP-B is a satellite from the United States, launched on Apr 20, 2004 from Air Force Western Test Range.

It circles Earth every 97 minutes (14.8 times a day), between 616 and 621 km up, on an orbit tilted 89.9° to the equator, so its path covers latitudes up to 90° north and south.

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

space observatory to test frame dragging and geodetic effect

Operated by
Stanford University
Built by
Lockheed Martin, Stanford University
Mass
3,334 kg

Wikipedia article ↗ · Names and facts: Wikidata (CC0).

Orbit height over the past year

Over the last 24 days its lowest point went from 617 km to 616 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)
616618620Nov 26

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