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Eris

Eris when it was discovered was believed to be larger than Pluto, the then nineth planet. Since Eris was discovered, Pluto was downgraded to that of dwarf planet because it doesn`t clear the neighbourhood already. A lot of people call that reason a fudge. At one time, the Kuiper Belt Object was believed to be larger than Pluto.

When Michael Brown and his associates discovered Eris, it was called Xena after the television character Xena, Warrior Princess. The moon of Eris was named Gabrielle after the character that accompanied Xena on her adventures. The I.A.U. didn`t approve of the name and therefore named it Eris. Gabrielle was named Dysnomia. It took a long time for the dwarf planet to be given a name. Eris was chosen finally after a year and half. Eris was the goddess of discord and strife.

Eris is more than twice the distance from the Sun to Pluto and there are no plans at the present to send a probe that far out. It took about nine years for New Horizons mission to reach Pluto.National Geographic.

A mission to Eris would take an estimated 25 years (rounded up) to travel there using a Jupiter assistance in April 2032 or April 2044. Ref: Harvard Unless you`re very young, youll probably not get to see what Eris looks like. It took 85 years for us to see what Pluto looked like.

The only way we`ll be able to learn anything new about the planet at the moment is if we studied it from our Earth based telescopes (including those in orbit). If we ever discover how to travel faster than light, people would then be all over the planet.

Sedna was for a long time, the record holder of being the furthest point from the Sun within the solar System. Sedna is 86 Astronomical Units (1 Astronomical Unit is equal the distance from the Sun to the Earth) Ref: Wiki and Eris is 96.4 Astronomical Units. Eris is roughly three times the distance of Pluto. Ref: The Planets,

The search is on for another planet that is believed to be even further out than both Eris and Sedna. The evidence for this is that most of the distant Kuiper Belt Objects are angled away from a certain area of the sky. The planet is believed to have a mass 10x that of the Earth and orbit 20x further out than Neptune. Neptune is about 30 A.U., the planet would be 300 A.U. At that distance, it would not be in the Oort Cloud which is a distance of about 5,000 to 100,000 based on Google figures.

Eris is a Kuiper Belt object, a large rock that orbits round outside the orbit of Neptune. It has been categorised as a Trans-Neptunian object. It was discovered on 21st October 2003 by M. E. Brown, C. A. Trujillo and D. Rabinowitz . Its takes 8 hours to do a full rotation period.

The Aphelion of the object is 14,594,512,904 km A.U. which is the point in the orbit that is furthest from the object that it is orbit. At this point, it will then return back to the orbit target. The Perihelion of the object is 5,765,732,799 km A.U. which is the point in the orbit that is closest to the object that it is orbit around.

The Semi-Major Axis of the orbit is 10,180,122,852 km, which is the furthest point from the centre to the edge of an elliptical point.

The orbital inclination, the angle at which Eris orbits in relation to the orbital plane is 46.87 degrees.

Eris Facts


TypeKuiper Belt Object
Date of Discovery21st October 2003
DiscovererM. E. Brown, C. A. Trujillo and D. Rabinowitz
Rotation Period8 hours
Aphelion (Furthest)14,594,512,904 km A.U.
Perihelion (Nearest)5,765,732,799 km A.U.
Semi-Major Axis10,180,122,852 km
Orbital Inclination46.87



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