Sedna

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Sedna

NASA diagram shows the presumed distance of the Oort cloud compared to the solar system planets, the Kuiper belt, and the orbit of Sedna.

Sedna
Date of discovery	Date of discovery::November 14, 2003
Name of discoverer	Discoverer::Michael E. Brown, C. Trujillo, D. Rabinowitz
Orbital characteristics
Celestial class	Member of::Trans-Neptunian object
Primary	Primary::Sun
Perihelion	Periapsis::76.361 AU
Aphelion	Apoapsis::937 AU
Semi-major axis	Semi-major axis::518,57 AU
Orbital eccentricity	Orbital eccentricity::0.8527
Physical characteristics
Color	Color::#FFFFFF

Sedna or 90377 Sedna is a trans-Neptunian object discovered in 2003, which lies about three times farther from the Sun than Neptune. Many astronomers consider it a dwarf planet.

Comparison of the eight brightest TNOs: Eris, Pluto, Makemake, Haumea, Sedna, 2007 OR10, Quaoar, and Orcus

See Also

• Galaxy
• Stellar evolution
• Star
• Supernova