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Objects Encyclopedia Entry 1782490085

** The **Kuiper Belt Object (KBO) 2007 OR10** is a trans-Neptunian object discovered in 2007, providing valuable insights into the formation and evolution of the outer Solar System. **CONTENT:** ### Overview The **Kuiper Belt Object (KBO) 2007 OR10** is a small, icy world located in the outer reaches of the Solar System. It is one of the many KBOs, a class of objects that inhabit the Kuiper Belt, a region of icy bodies and other small celestial objects beyond the orbit of Neptune. The discovery of 2007 OR10 has shed light on the formation and evolution of the outer Solar System, offering a unique opportunity to study the early history of our cosmic neighborhood. Located approximately 70 astronomical units (AU) from the Sun, 2007 OR10 is a relatively large KBO, with a diameter of around 700 kilometers (435 miles). Its surface is composed primarily of water ice, with possible contributions from darker organic material. The object's highly eccentric orbit takes it from 30 to 55 AU from the Sun, making it one of the most distant known KBOs. ### History/Background The discovery of 2007 OR10 was announced on August 4, 2007, by a team of astronomers led by Mike Brown of Caltech. The object was detected using the Palomar Observatory's 1.2-meter Schmidt telescope in California. Initial observations suggested that 2007 OR10 was a large KBO, but further studies revealed its highly eccentric orbit and unusual composition. ### Key Information * **Orbital Period:** 1,100 years * **Diameter:** approximately 700 kilometers (435 miles) * **Surface Composition:** primarily water ice, with possible contributions from darker organic material * **Orbital Eccentricity:** 0.45 * **Perihelion:** 30 AU * **Aphelion:** 55 AU The study of 2007 OR10 has provided valuable insights into the formation and evolution of the outer Solar System. Its highly eccentric orbit suggests that the object may have originated from a region closer to the Sun, where the gravitational influence of the giant planets was weaker. This, in turn, may have allowed 2007 OR10 to migrate to its current location in the Kuiper Belt. ### Significance The discovery of 2007 OR10 has significant implications for our understanding of the outer Solar System. Its highly eccentric orbit and unusual composition provide a unique window into the early history of our cosmic neighborhood. The study of 2007 OR10 has also raised questions about the formation and evolution of the Kuiper Belt, and the role of gravitational interactions with the giant planets in shaping the outer Solar System. **INFOBOX:** - **Name:** 2007 OR10 - **Type:** Kuiper Belt Object (KBO) - **Date:** August 4, 2007 (discovery announced) - **Location:** Kuiper Belt, outer Solar System - **Known For:** Highly eccentric orbit and unusual composition **TAGS:** Kuiper Belt Object, Trans-Neptunian Object, Outer Solar System, Icy World, Water Ice, Organic Material, Gravitational Interactions, Solar System Evolution.