Objects Encyclopedia Entry 1775324344
SUMMARY: The Kuiper Belt Object (KBO) 2007 OR10, also known as Eris, is a dwarf planet located in the outer reaches of the Solar System, beyond the orbit of Neptune.
Overview
The Kuiper Belt is a region of icy bodies, asteroids, and other small celestial objects that extends from about 30 to 55 astronomical units (AU) from the Sun. Within this vast expanse, a multitude of Kuiper Belt Objects (KBOs) have been discovered, each with its unique characteristics. One such fascinating object is 2007 OR10, also known as Eris. This dwarf planet was discovered on July 26, 2007, by the Palomar Observatory in California, USA. Initially thought to be the tenth Pluto, it was later classified as a dwarf planet due to its size and orbital characteristics.
Eris is a fascinating object that has contributed significantly to our understanding of the Solar System. Its discovery sparked a debate about the definition of a planet, ultimately leading to the reclassification of Pluto as a dwarf planet. This event marked a significant shift in our understanding of the Solar System and its many mysteries.
History/Background
The discovery of Eris is a fascinating story that began with the observations of the Palomar Observatory. The observatory's 1.2-meter Schmidt telescope was used to scan the skies for objects in the Kuiper Belt. On July 26, 2007, a team of astronomers led by Mike Brown, Chad Trujillo, and David Rabinowitz discovered a small, icy object with an unusual orbit. Initial observations suggested that the object was similar in size to Pluto, leading to speculation that it might be the tenth Pluto.
However, further observations revealed that Eris was slightly larger than Pluto, with a diameter of approximately 2,326 kilometers (1,445 miles). This discovery sparked a heated debate about the definition of a planet, with some arguing that Eris should be considered the tenth planet. Ultimately, the International Astronomical Union (IAU) redefined the term "planet" in 2006, classifying Eris as a dwarf planet due to its size and orbital characteristics.
Key Information
Eris is a fascinating object with several unique characteristics. Here are some key facts about this dwarf planet:
* Diameter: Approximately 2,326 kilometers (1,445 miles)
* Mass: Estimated to be around 16% of the mass of Pluto
* Orbit: Eris has a highly eccentric orbit, taking it as close as 37.8 AU from the Sun and as far as 95.6 AU from the Sun
* Surface: Eris has a surface composed primarily of water ice, with possible tholins (complex organic molecules) present
* Moons: Eris has one known moon, Dysnomia, which was discovered in 2005
Significance
The discovery of Eris has had a significant impact on our understanding of the Solar System. Its discovery sparked a debate about the definition of a planet, ultimately leading to the reclassification of Pluto as a dwarf planet. This event marked a significant shift in our understanding of the Solar System and its many mysteries.
Eris is also an important object for studying the formation and evolution of the Solar System. Its highly eccentric orbit suggests that it may have formed in a different region of the Solar System, possibly in the Oort Cloud. Studying Eris and other KBOs can provide valuable insights into the early history of the Solar System and the formation of the planets.
INFOBOX:
- Name: 2007 OR10 (Eris)
- Type: Dwarf Planet
- Date: July 26, 2007
- Location: Kuiper Belt
- Known For: Discovery of a dwarf planet that sparked a debate about the definition of a planet
TAGS: Kuiper Belt Object, Dwarf Planet, Solar System, Pluto, International Astronomical Union, Orbital Characteristics, Surface Composition, Moons
