90377 Sedna is a large minor planet in the outer reaches of the Solar System that was, as of 2015, at a distance of about 86 astronomical units (1.29×10 km; 8.0×109 mi) from the Sun, about three times as far as Neptune. Ua faailoa mai i le spectroscopy o le Sedna's surface composition is similar to those of some other trans-Neptunian objects, being largely a mixture of water, methane, and nitrogen ices with tholins. O lona laualuga o se tasi o mea sili ona mumu i le Solar System. E foliga mai o se paneta o le Sedna. I totonu o le valu sili ona tele trans-Neptunian mea faitino, Sedna e na o le tasi e le iloa e iai se masina. Mo le tele o lona tulaga, e mamao atu nai lo le Sun i le taimi nei, ma lona aphelion i le 9371 AU mai le Sun, e tusa ma le tolu taimi mamao atu nai lo Neptune. O nei mea moni ua faʻaalia mai le spectroscopy ua faʻaalia ai o le Sedna's luga o
lanu mumu