Sedna (minor-planet designation: 90377 Sedna) is a dwarf planet in the outermost reaches of the Solar System, orbiting the Sun beyond the orbit of Neptune.
People also ask
Why is Sedna not a dwarf planet?
It's likely Sedna is a dwarf planet, but uncertain, because it's so far away and hard to measure. In order to qualify as a dwarf planet, a body must have enough gravity (mass) to assume a rounded shape and may not be a satellite of another body.
Jan 22, 2020
Why is Sedna's orbit so strange?
Sedna's orbit is also one of the most narrow and elliptical discovered, with an eccentricity of 0.8496. This means that its perihelion, or point of closest approach to the Sun, at 76 AU is around 12.3 times closer than its aphelion. At perihelion, Sedna is only 55% further than Pluto's aphelion.
Is Sedna bigger than Pluto?
The diameter of Sedna is slightly smaller than Pluto's but likely somewhat larger than Quaoar.
Is Sedna the farthest dwarf planet?
Beyond Pluto lies Eris, the furthest currently-recognized dwarf planet. 90377 Sedna is a planet-like object in the outer reaches of the Solar System currently being considered as a possible dwarf planet.
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Apr 26, 2024 · Sedna, small body in the outer solar system that may be the first discovered object from the Oort cloud. Sedna was discovered in 2003 by a ...
Apr 29, 2014 · Sedna is a dwarf planet candidate that is one of the most distant bodies found in our solar system.
Sedna, officially designated as 90377 Sedna is a dwarf planet candidate in the outermost reaches of the Solar System discovered in 2003.
Feb 25, 2021 · So I've been doing some independent research on various space topics, and one of the subjects I looked at was what makes a planet a planet.
) is a trans-Neptunian object which is the farthest dwarf planet from the Sun. It was discovered on November 14, 2003 by Mike Brown, Chad Trujillo and David ...
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Posted: Jan 6, 2023
Posted: Jan 6, 2023
Mar 8, 2021 · It's probably a dwarf planet, but not officially, because we're not sure if it passes the requirements for a dwarf planet.
Jan 22, 2020 · Sedna is dwarf planet out far beyond Pluto. Here's what we know about Sedna so far and a look at what we suspect is true.