OrbitNight

NORAD 2657

ESSA 4 (TOS-B)

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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Its orbit in 3D

Goes round Earth once every 113 minutes, on an orbit tilted 102.1° from the equator, between 1,338 and 1,451 km up. Earth is drawn to scale.

Drag to turn · pinch to zoom · it moves live

About ESSA 4 (TOS-B)

ESSA 4 (TOS-B) is a satellite from the United States, launched on Jan 26, 1967 from Air Force Western Test Range.

It circles Earth every 113 minutes (12.7 times a day), between 1,326 and 1,439 km up, on an orbit tilted 102.1° to the equator, so its path covers latitudes up to 78° north and south.

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

ESSA-4 · former American weather satellite

Operated by
Environmental Science Services Administration
Built by
RCA Corporation
Mass
286 kg

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

Orbit height over the past year

Over the last 9 days its lowest point went from 1,326 km to 1,326 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)
1,3501,4001,450

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