is eris coming through are solar system?If so when?

Eris is a dwarf planet that orbits the Sun in an extremely eccentric and very long orbit. It is already part of our solar system.

The closest it ever gets to the Sun is about 38 AUs (that is, 38 times the distance between the Sun and the Earth) and thus it is not really a threat to anyone.

Eris (UB313) was named after the Greek goddess of discord and strife. She stirs up jealousy and envy to cause fighting and anger among men. At the wedding of Peleus and Thetis all the gods were invited with the exception of Eris, and, enraged at her exclusion, she spitefully caused a quarrel among the goddesses that led to the Trojan war.

Aptly named, the icy dwarf planet, Eris, has rattled the general model of our solar system. The object was discovered on January 5, 2005 by Mike Brown, Chad Trujillo and David Rabinowitz at Palomar observatory in the out reaches of the Kuiper belt. The discovery came from images taken on October 21, 2003. It was announced on July 29, 2005.

Its detection provoked debate about Pluto's classification as a planet. Eris is slightly larger than Pluto.

So if Pluto qualified as a full-fledged planet, then Eris certainly should too. Astronomers attending the International Astronomical Union meeting in 2006 worked to settle this dilemma. In the end, we lost a planet rather than gaining one. Pluto was reclassified as a dwarf planet along with Eris and the asteroid Ceres, the most massive member of the asteroid belt.

Eris is the largest dwarf planet in the solar system and is the largest object found in orbit around the Sun since the discovery of Neptune and its moon Triton in 1846. It has a diameter between 2,400 and 3,000 kilometres (1,490 to 1,860 miles) and is 27% more massive than Pluto.

Eris is the most distant object ever seen in orbit around the Sun, even more distant than Sedna, the Kuiper Belt object discovered in 2003. It is almost 10 billion miles from the Sun and more than 3 times more distant than Pluto and takes more than twice as long to orbit the Sun as Pluto. It has an orbital period of 556.7 years

Its already part of our solar system, but it will never reach us.. the closest it gets is 38(AU) from the sun. which translates into 38 X the distance from earth to the sun wich is 93,000,000 x 38 so around 4 billion or so miles from us.. sorry if you were hoping to see it fly by.. :(