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Encyclopedia > Uranus > Satellites > Ariel

ARIEL : SATELLITE I OF URANUS


Credit : C. J. Hamilton/NASA


Ariel, ( Uranus I) was discovered by William Lassel in 1851. Its revolution period is 2 days and 12 hours. 

Origin of the name : click here.

Characteristics Values
Semi-major axis in km  190 945 
Revolution period  2.520 days 
Rotation period   2.520 days
Orbital velocity 5.5 km/s
Inclination on the Uranus's equator 1.56°
Eccentricity of the orbit 0.012
Equatorial diameter (Earth=1)  0.04
Equatorial diameter 1162 km
Visual magnitude at the opposition 14.4
Flattening  0 
Mass (Uranus=1)  1.56/100 000 
Density (Water=1)  1.7 
Escape velocity 541 m/s
Reflectivity (geometric albedo) 0.34
The highest peak 4000m
Deepest pit 4000m
Atmosphere no
Composition ice  
silicates