NORAD 27663
NAVSTAR 51 (USA 166)
In 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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Identity
- NORAD ID
- 27663
- International designator
- 2003-005A
- Launch date
- Jan 29, 2003
- Launch site
- AIR FORCE EASTERN TEST RANGE
- Radar size (RCS)
- Large (over 1 m²)
Radio
- Uplink
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- Downlink
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- Beacon
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- Mode
- -
Active transmitters from SatNOGS DB, licensed CC BY-SA 4.0.
Your station
- Grid locator
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Live
- Azimuth
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- Elevation
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- Range
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- Range rate
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- Naked-eye visibility
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- Sub-satellite grid
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- Footprint diameter
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Upcoming passes
Next 48 h · your local timeUse your location to predict passes.
Mutual visibility
With another station · next 48 hUse your location to find mutual windows.
Transmitters
Nominal · add location for Doppler-
Recent receptions
SatNOGS Network-
Orbit data
- TLE epoch
- 2026-10-17 18:34:56 UTC
- TLE age
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Radio data from SatNOGS DB and SatNOGS Network, licensed CC BY-SA 4.0.
About NAVSTAR 51 (USA 166)
NAVSTAR 51 (USA 166) is a satellite from the United States, launched on Jan 29, 2003 from Air Force Eastern Test Range.
It circles Earth every 718 minutes (2.0 times a day), between 19,779 and 20,587 km up, on an orbit tilted 54.9° to the equator, so its path covers latitudes up to 55° north and south.
The map shows where it is right now; the pass list tells you when it next comes over your location.
USA-166 · Global Positioning System (GPS) satellite
- Operated by
- United States Air Force
- Built by
- Lockheed Martin
Wikipedia article ↗ · Names and facts: Wikidata (CC0).