Rings of Uranus one of which, Mab, shares its orbit with the outermost newly discovered μ ring. As currently understood, the ring system of Uranus comprises thirteen distinct rings. In order of increasing distance from the planet they are: 1986U2R/ζ, 6, 5, 4, α, β, η, γ, δ, λ, ε, ν, μ rings. They can be divided into three groups: nine narrow main rings (6, 5, 4, α, β, η, γ, δ, ε), two dusty rings (1986U2R/ζ, λ) and two outer rings (ν, μ). The rings of Uranus consist mainly of macroscopic particles and little dust, although dust is known to be present
Rings of Chariklo National Observatory in Rio de Janeiro, the Valongo Observatory (at the Federal University of Rio de Janeiro), the Oeste do Paraná State University Observatory or Unioeste (in the state of Paraná), the Pico dos Dias Observatory or OPL (in Minas Gerais) and the São Paulo State University (UNESP – Guaratinguetá) in São Paulo, Rings of Chariklo The minor planet and centaur 10199 Chariklo, with a diameter of about , is the smallest celestial object with confirmed rings and the fifth ringed celestial object ever discovered in the Solar System, after the gas giants and ice giants. Orbiting Chariklo is a