Eris (dwarf planet)
Eris was discovered in January 2005 by a Palomar Observatory-based team led by Mike Brown. In September 2006 it was named after the Greco-Roman goddess of strife and discord. Eris is the ninth-most massive known object directly orbiting the Sun. It is also the largest object that has not been visited by a spacecraft. Its mass is 0. 27 percent that of the Earth and 127 percent of dwarf planet Pluto.
About Eris (dwarf planet) in brief
Eris was discovered in January 2005 by a Palomar Observatory-based team led by Mike Brown. In September 2006 it was named after the Greco-Roman goddess of strife and discord. Eris is the ninth-most massive known object directly orbiting the Sun. It is also the largest object that has not been visited by a spacecraft. Its mass is 0. 27 percent that of the Earth and 127 percent of dwarf planet Pluto, though Pluto is slightly larger by volume. In February 2016, its distance from the Sun was 96. 3 astronomical units, roughly three times that of Pluto. Until 2018 VG18 was discovered on December 17, 2018, Eris and Dysnomia were the most distant known natural objects in the Solar System. The name Eris was proposed by the Caltech team on September 6, 2006, following an unusually long period in which the object was known by the provisional designation 2003B313. The provisional designation was granted automatically by the IAU under their naming protocols for minor planets under their new definition of the term ‘dwarf planet’ Eris has been measured at 2,326 ± 12 kilometers in diameter. It has one large known moon, dysnomia, which in June 2007 was calculated to be 27%±2% greater than Eris, which later was named in honor of the Greek goddess Eris, a personification of strife, discord, and a person with a short English pronunciations with a long English word for ‘e’ The object was discovered by the team of Mike Brown, Chad Trujillo, and David Rabinowitz on January 5, 2005, from images taken on October 21, 2003.
The discovery was announced the same day as Makemake and two days after Haumea, due in part to events that would later lead to controversy about Haumesa. The search team had been systematically scanning for large outer Solar System bodies for several years, and had been involved in the discovery of several other large TNOs, including 50000 Quaoar, 90482 Orcus, and 90377 Sedna. In January 2005, the re-analysis revealed Eris’s slow motion against the background stars. Follow-up observations were then carried out to make a preliminary determination of Eris’s orbit, which allowed the object’s distance to be estimated. The team had planned to delay announcing their discoveries of the bright objects Eris. and Makemake until further observations and calculations were complete, but announced them both on July 29 when the discovery was controversially announced on July 27 by a different team in Spain. With the exception of some long-period comets, until 2018VG18 was found in December 2018. Eris now has a moon, Dysnomian, which was later calculated by scientists to be 1.1022 kg (1.2 tonnes) Eris also has an orbit around the Sun that makes it the sixthteenth most massive object overall in the solar system.
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This page is based on the article Eris (dwarf planet) published in Wikipedia (as of Dec. 06, 2020) and was automatically summarized using artificial intelligence.
