Without a telescope
BarelyOnly on its best passes and from a dark site: magnitude +5.6 at its best, at the limit of the naked eye. Binoculars make it easy.
Satellites›Weather satellites›DMSP 5D-3 F17 (USA 191)
DMSP 5D-3 F17 (USA 191)
DMSP 5D-3 F17 (USA 191) is a weather satellite from the United States, launched on November 4, 2006 from Vandenberg, California, United States. It is in a low orbit, 835 to 849 km above the ground, and goes around the Earth every 101.8 minutes: 14.2 times a day, at 7.43 km/s (26,700 km/h). The orbit is sun-synchronous: it crosses every place at about the same local time of day.
Where DMSP 5D-3 F17 (USA 191) is right now
The gold ring is its orbit, and the line drops to the point on the ground under it. Inside the white circle it is above the horizon. Drag the globe to turn it, pinch or use the buttons to come closer; the target button brings you back to the satellite. The 2D map shows its path over the ground for the next lap: gold where it is in sunlight, dashed where it is in Earth’s shadow.
Finding DMSP 5D-3 F17 (USA 191)…
DMSP 5D-3 F17 (USA 191)
Finding DMSP 5D-3 F17 (USA 191)…
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Can you see it?
From where
Its orbit crosses close to both poles, so sooner or later it passes over every place on Earth.
A satellite shows only when your sky is dark and it is still in sunlight: in the hours after dusk and before dawn.
When it passes over you
The app works out its passes over your exact location, alerts you before one, and leads you to it with an arrow in the camera view.
The facts
- Catalogue number (NORAD)
- 29522
- International designator
- 2006-050A
- Type
- Satellite
- Belongs to
- United States
- Launched
- November 4, 2006
- Launched from
- Vandenberg, California, United States
- Status
- Operational
- Orbit
- Low Earth orbit, sun-synchronous
- Lowest point
- 835 km
- Highest point
- 849 km
- Tilt to the equator
- 98.7°
- One lap
- 101.8 minutes
- Laps a day
- 14.15
- Speed
- 7.43 km/s
- At its brightest
- mag +5.6 estimated, overhead
- Standard brightness
- mag +6.0 from 1,000 km, half lit
- Size on radar
- 4.5 m²
Orbit measured November 13, 2026, from CelesTrak. Heights are above the ground at the equator. Page updated November 14, 2026.
Quick answers
Where is DMSP 5D-3 F17 (USA 191) right now?
The map on this page shows where DMSP 5D-3 F17 (USA 191) is at this moment, the path it will follow over the ground for the next lap, and the part of the Earth it is above the horizon for. It is worked out from the latest tracking data.
How high is DMSP 5D-3 F17 (USA 191)?
Between 835 km at its lowest and 849 km at its highest, above the ground.
How fast does DMSP 5D-3 F17 (USA 191) go?
About 7.43 km/s, which is 26,700 km/h. One lap of the Earth takes it 101.8 minutes, so it goes around 14.2 times a day.
Can you see DMSP 5D-3 F17 (USA 191) without a telescope?
Barely. Only on its best passes and from a dark site: magnitude +5.6 at its best, at the limit of the naked eye. Binoculars make it easy.
When was DMSP 5D-3 F17 (USA 191) launched?
On November 4, 2006, from Vandenberg, California, United States.
With the app
Knowing where it is over the Earth is one thing. The app shows you where it is in your sky.
This page follows the satellite around the planet. The app works out when it passes over you, and leads you to it.
- Every pass over your exact location, for this satellite and 10,000+ more.
- An alert before it rises, so you are outside in time.
- An arrow in the camera view that leads you to the exact spot in the sky.
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