2002 MS4

Overview: 2002 MS4 is one of the largest known classical Kuiper Belt Objects, rivaling Varuna and Ixion in size. Its dark surface and distant orbit make it an intriguing candidate for dwarf planet status.

Discovery: Discovered on September 18, 2002, by Chad Trujillo and Michael E. Brown at Palomar Observatory.

Orbit: It orbits at an average distance of 41.7 AU, with a period of about 269 years, in a relatively circular and moderately inclined orbit.

Size and Surface: 2002 MS4 has a diameter of around 934 km, with a dark, neutral-colored surface likely dominated by water ice and organics.

Fun Fact: Despite its size, 2002 MS4 has not been observed to have a moon, making mass and density estimates more challenging than for other large KBOs.