OrbitNight

NORAD 21574

ERS 1

📡 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 100 minutes, on an orbit tilted 98.8° from the equator, between 777 and 812 km up. Earth is drawn to scale.

Drag to turn · pinch to zoom · it moves live

About ERS 1

ERS 1 is a satellite from the European Space Agency, launched on Jul 17, 1991 from French Guiana.

It circles Earth every 100 minutes (14.4 times a day), between 738 and 782 km up, on an orbit tilted 98.8° to the equator, so its path covers latitudes up to 81° north and south.

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

ERS-1 · European Earth observation satellite (1991-2000)

Operated by
ESA Centre for Earth Observation, European Space Operations Centre
Built by
DASA, Matra Marconi Space
Mass
2,384 kg

Names and facts: Wikidata (CC0).

Orbit height over the past year

Over the last 18 days its lowest point went from 738 km to 738 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)
740750760770780

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