Sedna

Sedna — dwarf planet, explore its interactive 3D model in Cosmoscope.

Explore Sedna in a live 3D Solar System. Follow its calculated motion and inspect real astronomical data, distances and orbital facts.

One of the most distant known worlds, on an orbit so vast a single year lasts over eleven millennia. Its extreme, detached path is a key clue in the hunt for a possible undiscovered Planet Nine.

Radius

~500 km

Discovered

2003

Year

~11,400 Earth years

Perihelion

76 AU — never comes near the planets

Aphelion

~900 AU

Region

Inner Oort Cloud

Explore Sedna in 3D

Cosmoscope places Sedna in the Solar System using astronomical ephemeris or orbital elements, updated for the simulation time. Explore its calculated motion, distance and orbital facts in the interactive 3D view. Accuracy depends on the orbital model and its valid time range.