90377 Sedna 🪐

90377 Sedna, or simply Sedna, is a large planetoid in the outer reaches of the Solar System that was, as of 2020, at a distance of about 85 astronomical units from the Sun, about three times as far as Neptune.

Orbital period: 11,408 years

Radius: 497.5 km

Discovered: 14 November 2003

Orbits: Sun

Temperature: ≈ 12 K

Perihelion: 76.257 AU (11.4079 Tm)