|Orbit||semi-major axis 506.2 AU, eccentricity 0.85491±0.00029|
|Diameter||995±80 km ? (thermophysical model)|
1060±100 km ? (standard thermal model)
|Year||~11400 Earth years|
|Mean Temperature||~12 K|
90377 Sedna is a Sol system dwarf planet, believed by its discoverers to be part of the Oort cloud.
It was discovered by Michael Brown, Chad Trujillo, and David Rabinowitz on 14 November 2003, and is named after the Inuit goddess of the sea.