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Celestial Object

Eris

Dwarf Planets

Eris is one of the largest known dwarf planets, roughly the same size as Pluto but orbiting about three times farther from the Sun; its 2005 discovery triggered the scientific debate that led the International Astronomical Union to redefine the term planet in 2006, reclassifying Pluto as a dwarf planet in the process.

Facts
Object Type
Dwarf Planet 1
Diameter (km)
2400 1
Orbital Distance
68 AU, about 10 billion km, from the Sun 1
Discovery Year
2005 1
Classification
Catalogue
Other or Uncatalogued 1
Connections

Associated With

Palomar Observatory, Observatories and Instruments
Source NASA Science - Eris (Dwarf Planets)NASA

Orbits

Sun, Celestial Objects
Source NASA Solar System Exploration
Sources
1. NASA Solar System Exploration
National Aeronautics and Space Administration
  • science.nasa.gov, Dwarf Planets: Eris
    The discovery of Eris help trigger a debate in the scientific community that led to the International Astronomical Union's decision in 2006 to clarify the definition of a planet.
  • Entity description, eris-dwarf-planet catalogue classification
    Eris is one of the largest known dwarf planets, roughly the same size as Pluto but orbiting about three times farther from the Sun; its 2005 discovery triggered the scientific debate that led the International Astronomical Union to redefine the term planet in 2006, reclassifying Pluto as a dwarf planet in the process.
View the Source
Wikipedia: Eris (dwarf planet)
In Group: Trans-Neptunian Dwarf Planets, Lead sentence
Quote, In Group: Trans-Neptunian Dwarf Planets, Lead sentence
It is a trans-Neptunian object (TNO) in the scattered disk and has a high-eccentricity orbit.
View the Source
NASA Science - Eris (Dwarf Planets)
NASA, NASAAssociated With: Palomar Observatory, Discovery section
Quote, Associated With: Palomar Observatory, Discovery section
Eris was discovered on Jan. 5, 2005, from data obtained on Oct. 21, 2003, during a Palomar Observatory survey of the outer solar system by Mike Brown, a professor of planetary astronomy at the California Institute of Technology; Chad Trujillo of the Gemini Observatory; and David Rabinowitz of Yale University.
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