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Astronomers are in general agreement that at least the nine largest candidates are dwarf planets – in rough order of size, Pluto, Eris, Haumea, Makemake, Gonggong, Quaoar, Ceres, Orcus, and Sedna. Considerable uncertainty remains over the tenth largest candidate Salacia , which may thus be considered a borderline case.
The symbol for Ceres, as well as the second symbol for Uranus, was taken from material published by James L. Hilton. [104] The other dwarf-planet symbols were invented by Denis Moskowitz, a software engineer in Massachusetts. His symbols for Haumea, Makemake, and Eris appear in a NASA JPL infographic, as does the second symbol for Pluto. [105]
Eris was discovered by the team of Mike Brown, Chad Trujillo, and David Rabinowitz [2] on January 5, 2005, from images taken on October 21, 2003. [31] The discovery was announced on July 29, 2005, the same day as Makemake and two days after Haumea, [32] due in part to events that would later lead to controversy about Haumea.
Dwarf planet Eris, similar in size to its better-known cosmic cousin Pluto, has remained an enigma since being discovered in 2005 lurking in the solar system's far reaches. While Pluto was ...
Pluto–Charon, Eris, Haumea, Gonggong, Makemake, Quaoar, and Sedna are either known (Pluto) or strong candidates (the others). Orcus is again just above the threshold by size, though it is bright. There are a number of smaller bodies, estimated to be between 700 and 900 km in diameter, for most of which not enough is known to apply these criteria.
There is a strong consensus among astronomers [e] that the Solar System has at least nine dwarf planets: Ceres, Orcus, Pluto, Haumea, Quaoar, Makemake, Gonggong, Eris, and Sedna. There are a vast number of small Solar System bodies, such as asteroids, comets, centaurs, meteoroids, and interplanetary dust clouds.
Pluto, a dwarf planet. Complete list of Pluto's natural satellites. Charon; Twotinos; Cubewanos (classical objects) Haumea, a dwarf planet. Namaka; Hiʻiaka; Quaoar, a dwarf planet. Weywot; Makemake, a dwarf planet (307261) 2002 MS 4; 120347 Salacia; 20000 Varuna; Scattered-disc objects Gonggong, a dwarf planet. Xiangliu; Eris, a dwarf planet ...
Ceres ⚳ Pallas ⚴ Juno ⚵ ... Pluto ♇ Moons of Pluto. Charon; Haumea. Moons of Haumea; Ring of Haumea; Makemake. Moon of Makemake; Quaoar. Moon of Quaoar; Rings ...