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  2. Eris (dwarf planet) - Wikipedia

    en.wikipedia.org/wiki/Eris_(dwarf_planet)

    Eris has been measured at 2,326 ± 12 kilometres (1,445 ± 7 mi) in diameter; [12] its mass is 0.28% that of the Earth and 27% greater than that of Pluto, [23] [24] although Pluto is slightly larger by volume. [25] Both Eris and Pluto have a surface area that is comparable to that of Russia or South America. Eris has one large known moon, Dysnomia.

  3. Dysnomia (moon) - Wikipedia

    en.wikipedia.org/wiki/Dysnomia_(moon)

    Dysnomia (formally (136199) Eris I Dysnomia) is the only known moon of the dwarf planet Eris and is the second-largest known moon of a dwarf planet, after Pluto I Charon. It was discovered in September 2005 by Mike Brown and the Laser Guide Star Adaptive Optics (LGSAO) team at the W. M. Keck Observatory .

  4. List of natural satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_natural_satellites

    Among the other dwarf planets, Ceres has no known moons. It is 90 percent certain that Ceres has no moons larger than 1 km in size, assuming that they would have the same albedo as Ceres itself. [6] Eris has one large known moon, Dysnomia. Accurately determining its size is difficult: one indicative estimate of its radius is 350 ± 57.5 km. [7]

  5. Astronomers Find New Mysterious Moons in Our Solar System ...

    www.aol.com/astronomers-mysterious-moons-solar...

    Both moons have a nearly circular orbit, suggesting they may have formed near the Red Planet, possibly the result of a massive Martian asteroid impact that shed debris. ... Dysnomia (Eris) 42 ...

  6. List of gravitationally rounded objects of the Solar System

    en.wikipedia.org/wiki/List_of_gravitationally...

    The moons of the trans-Neptunian objects (other than Charon) have not been included, because they appear to follow the normal situation for TNOs rather than the moons of Saturn and Uranus, and become solid at a larger size (900–1000 km diameter, rather than 400 km as for the moons of Saturn and Uranus). Eris I Dysnomia and Orcus I Vanth ...

  7. Dwarf planet - Wikipedia

    en.wikipedia.org/wiki/Dwarf_planet

    Of these ten, two have been visited by spacecraft (Pluto and Ceres) and seven others have at least one known moon (Eris, Haumea, Makemake, Gonggong, Quaoar, Orcus, and Salacia), which allows their masses and thus an estimate of their densities to be determined.

  8. Portal:Solar System/Selected article/1 - Wikipedia

    en.wikipedia.org/wiki/Portal:Solar_System/...

    Eris has been measured at 2,326 ± 12 kilometres (1,445 ± 7 mi) in diameter; its mass is 0.28% that of the Earth and 27% greater than that of Pluto, although Pluto is slightly larger by volume. Both Eris and Pluto have a surface area that is comparable to that of Russia or South America. Eris has one large known moon, Dysnomia.

  9. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    Eris's discovery contributed to a debate about the definition of a planet because it is 25% more massive than Pluto [219] and about the same diameter. It has one known moon, Dysnomia. Like Pluto, its orbit is highly eccentric, with a perihelion of 38.2 AU (roughly Pluto's distance from the Sun) and an aphelion of 97.6 AU, and steeply inclined ...