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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
Nasasedna.jpg
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.[1][2][3]


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





References

  1. Barucci, et al. (2010). "(90377) Sedna: Investigation of surface compositional variation". The Astronomical Journal 140: 6. http://iopscience.iop.org/1538-3881/140/6/2095/. 
  2. Rabinowitz, Schaefer, Tourtellotte, 2011. "SMARTS Studies of the Composition and Structure of Dwarf Planets". Bulletin of the American Astronomical Society, Vol. 43
  3. Malhotra, 2010. "On the Importance of a Few Dwarf Planets". Bulletin of the American Astronomical Society, Vol. 41

See Also