Astrophysics (Index)About


(90377 Sedna, 2003 VB12)
(distant solar system planetoid discovered in 2003)

90377 Sedna (or Sedna or 2003 VB12, its provisional designation) is an extreme Kuiper Belt object (a KBO with high eccentricity and orbital inclination) with an aphelion on the order of 937 AU (18 times that of Pluto), currently about 85 AU distant. At the time of discovery, it was the most distant solar system object under observation. Some current theories regarding a Planet Nine aim to explain the orbital inclination of Sedna and similar objects.

(minor planet,KBO,TNO,eccentricity)
Further reading:
/Lookback Years

Referenced by pages:
Kuiper Belt (K Belt)
trans-Neptunian object (TNO)