Uranus () |
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Discovered by | [[{{#property:P61}}]] |
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Discovery date | Error: Invalid time. |
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Pronunciation | or |
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Named after | the Latin form Ūranus of the Greek god Οὐρανός Ouranos |
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Adjectives | Uranian () |
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Epoch J2000 |
Aphelion | 20.0965 AU (3006.39 Gm) |
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Perihelion | 18.2861 AU (2735.56 Gm) |
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| 19.19126 AU (2870.972 Gm) |
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Eccentricity | 0.04717 |
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| 369.66 days |
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| 6.80 km/s |
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| 142.238600° |
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Inclination | |
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| 74.006° |
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| 17–19 August 2050 |
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| 96.998857° |
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Known satellites | 27 |
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Mean radius | 25,362±7 km |
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| 25,559±4 km 4.007 Earths |
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| 24,973±20 km 3.929 Earths |
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Flattening | 0.0229±0.0008 |
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Circumference | 159,354.1 km |
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| 8.1156×109 km2 15.91 Earths |
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Volume | 6.833×1013 km3 63.086 Earths |
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Mass | (8.6810±0.0013)×1025 kg 14.536 Earths GM=5,793,939±13 km3/s2 |
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| 1.27 g/cm3 |
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| 8.69 m/s2 0.886 g |
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| 0.23 (estimate) |
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| 21.3 km/s |
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| −0.71832 d −17 h 14 m 23 s (retrograde) |
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| −0.71833 d −17 h 14 min 24 s (retrograde) |
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Equatorial rotation velocity | 2.59 km/s 9,320 km/h |
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| 97.77° (to orbit) |
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| 17h 9m 15s 257.311° |
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| −15.175° |
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Albedo | 0.300 (Bond) 0.488 (geom.) |
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| 5.38 to 6.03 |
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| 3.3″ to 4.1″ |
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| 27.7 km |
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Composition by volume | (Below 1.3 bar)
Gases: Ices: |
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Uranus is the seventh planet from the Sun in our Solar System. Like Neptune, it is an ice giant. It is the third largest planet in the solar system.
The planet is made of ice, gases and liquid metal. Its atmosphere contains hydrogen (1H), helium (2He) and methane. The temperature on Uranus is −197 °C (−322.6 °F; 76.1 K) near the top of its atmosphere. Its small solid core (about 55% the mass of Earth) is probably about 5,000 K (4,730 °C; 8,540 °F; 5,000 K)[convert: %s]%s.