OrbitNight

NORAD 21688

IRS 1B

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

Time

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Position

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Longitude
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Altitude
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Speed

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Kilometers per second
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Miles per second
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From your location

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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

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Its orbit in 3D

Goes round Earth once every 103 minutes, on an orbit tilted 99.4° from the equator, between 918 and 950 km up. Earth is drawn to scale.

Drag to turn · pinch to zoom · it moves live

About IRS 1B

IRS 1B is a satellite from India, launched on Aug 29, 1991 from Tyuratam Missile and Space Complex.

It circles Earth every 103 minutes (14.0 times a day), between 883 and 919 km up, on an orbit tilted 99.4° 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.

IRS-1B · Indian Earth observation satellite

Operated by
Indian Space Research Organisation
Built by
Indian Space Research Organisation
Mass
975 kg

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

Orbit height over the past year

Over the last 17 days its lowest point went from 883 km to 884 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)
880890900910920

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