Which dwarf planet is considered the largest in the solar system?

Eris is recognized as the largest dwarf planet in the solar system. It is located in the scattered disc, a distant area of the solar system beyond the orbit of Neptune. Eris has a diameter of approximately 2,326 kilometers, which is slightly larger than Pluto, making it the most massive and one of the most prominent dwarf planets.

Eris's discovery in 2005 as a member of the trans-Neptunian objects sparked significant discussion regarding the classification of celestial bodies and played a pivotal role in the redefinition of what constitutes a planet. Its mass is estimated to be about 27% more than that of Pluto, which also contributes to its classification as the largest known dwarf planet.

Ceres, while the only dwarf planet located in the asteroid belt between Mars and Jupiter, is significantly smaller than both Eris and Pluto. Haumea, another dwarf planet, is known for its elongated shape and rapid rotation but does not exceed the dimensions of Eris.

This context underscores why Eris holds the designation of the largest dwarf planet in our solar system.