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In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit , values between 0 and 1 form an elliptic orbit , 1 is a parabolic escape orbit (or capture orbit), and greater than ...
Eccentricity: 0.047 17: Orbital period (sidereal) ... Uranus is the seventh planet from the Sun. ... The orbital elements of Uranus were first calculated in 1783 by ...
Margaret stands out as the only prograde irregular satellite of Uranus. The diagram illustrates the orbital parameters of Margaret, unique among the irregular satellites of Uranus, with inclination on the vertical axis and the eccentricity of the orbits represented by the segments extending from the pericentre to the apocentre.
All the planets of the Solar System except for Mercury have near-circular orbits (e<0.1). [8] Most exoplanets with orbital periods of 20 days or less have near-circular orbits, i.e. very low eccentricity. That is thought to be due to tidal circularization: reduction of eccentricity over time due to gravitational interaction between two bodies.
Oberon orbits Uranus at a distance of about 584,000 km, being the farthest from the planet among its five major moons. [e] Oberon's orbit has a small orbital eccentricity and inclination relative to the equator of Uranus. [4] Its orbital period is around 13.5 days, coincident with its rotational period.
The rings of Uranus consists of 13 planetary rings. ... [12] [33] The α and β rings have sizable orbital eccentricity and non-negligible inclination. [23]
Retrograde irregular satellites of Uranus. Ferdinand is the most distant known satellite of Uranus. It follows a retrograde, modestly inclined but highly eccentric orbit. The diagram illustrates the orbital parameters of the retrograde irregular satellites of Uranus (in polar co-ordinates) with the eccentricity of the orbits represented by the segments extending from the pericentre to the ...
Vesta and Pallas are nonetheless sometimes considered small terrestrial planets anyway by sources preferring a geophysical definition, because they do share similarities to the rocky planets of the inner solar system. [56] The fourth-largest asteroid, Hygiea (radius 216.5 ± 4 km), is icy.