Sedna is a dwarf planet candidate in the outermost reaches of the Solar System, orbiting the Sun far beyond Neptune on one of the most distant and elongated paths known for any body of its size. Discovered in 2003, it is roughly 1,000 kilometers in diameter, and spectroscopic study of its surface shows a mixture of water ice, carbon dioxide, and ethane alongside reddish tholins, a chemical makeup similar to other distant trans-Neptunian objects. It is not expected to hold a substantial atmosphere, and because no moon has been found orbiting it, its mass and density remain unknown.
Facts
Discovery Year Sources
1. Wikipedia: Sedna (dwarf planet)
In Group: Trans-Neptunian Dwarf Planets, Lead sentenceQuote, In Group: Trans-Neptunian Dwarf Planets, Lead sentence
Sedna (minor-planet number 90377) is a dwarf planet in the outermost reaches of the Solar System, orbiting the Sun far beyond the orbit of Neptune.
Wikidata: Sedna
Wikipedia (space and spaceflight articles)
Wikimedia FoundationSedna, Wikipedia - lead section, catalogue classificationQuote, Sedna, Wikipedia - lead section, catalogue classification
Sedna most commonly refers to:
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