Margaret

Margaret (Uranus XXIII) provisionally known as S/2003 U 3, is the only known prograde irregular natural satellite of Uranus. It was named after the servant hero in William Shakespeare's play Much Ado About Nothing.
== Orbit ==
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.
Margaret's inclination of 57° is close to the limit of stability. The intermediate inclinations 60 < i < 140 are devoid of known moons due to the Kozai instability. In this instability region, solar perturbations at apoapse cause the moons in this region to acquire large eccentricities that lead to collisions or ejection over 10 million to a billion years. Margaret's periapsis precession period (Pw) is almost 1.6 million years long. Margaret itself may be ejected from the Uranian system in the far future.
Margaret's orbit is subject to solar and planetary perturbations; thus, its orbital elements are variable over short timescales. Over a timescale of 8,000 years, the average orbital eccentricity of Margaret is 0.68. In 2010, its eccentricity grew to 0.81, temporarily making Margaret with the most eccentric orbit of any moon in the Solar System, though Nereid's average eccentricity of 0.75 is greater.
Category:Moons
Category:Uranian Moons
Category:Irregular Satellites of Uranus
Category:Objects with No Atmosphere
Category:Objects Not in Hydrostatic Equilibrium
Category:Outer Solar System Object
Category:Prograde Satellite
Category:Named Objects
Category:Named Moons
Category:Numbered Objects
Category:Numbered Moons