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Objects Encyclopedia Entry 1779104284

** **Kuiper Belt Object (KBO) 20000 Varuna** is a trans-Neptunian object discovered in 2000, providing valuable insights into the formation and evolution of the outer Solar System. ## Overview Located in the Kuiper Belt, a region of icy bodies and other small celestial objects beyond Neptune, **20000 Varuna** is a fascinating example of a trans-Neptunian object (TNO). This KBO was discovered on November 28, 2000, by a team of astronomers led by Chad Trujillo and Mike Brown at the Palomar Observatory in California. **20000 Varuna** is one of the largest known TNOs, with a diameter estimated to be around 600 kilometers (373 miles). Its discovery has significantly contributed to our understanding of the outer Solar System and the formation of the planets. The Kuiper Belt is a vast, doughnut-shaped region that contains numerous small, icy bodies, including dwarf planets like Pluto and Eris. These objects are remnants from the early days of the Solar System, when the planets were still forming. **20000 Varuna** is a member of the **Kuiper Belt**, a region that is thought to be a reservoir for short-period comets. The discovery of this KBO has provided valuable insights into the composition and evolution of the outer Solar System. ## History/Background The discovery of **20000 Varuna** is a testament to the ongoing efforts of astronomers to explore the outer reaches of the Solar System. The object was discovered using a combination of observations from the Palomar Observatory and the Mauna Kea Observatory in Hawaii. The discovery team used a technique called **astrometry**, which involves measuring the position and motion of celestial objects over time to determine their orbits. **20000 Varuna** was initially thought to be a dwarf planet, but subsequent observations revealed that it was actually a KBO. ## Key Information **20000 Varuna** is a large KBO with a diameter estimated to be around 600 kilometers (373 miles). Its surface is thought to be composed primarily of water ice, with possible tholins (complex organic molecules) present. The object's orbit is highly eccentric, taking it from 38 to 48 astronomical units (AU) from the Sun. One astronomical unit is the average distance between the Earth and the Sun. **20000 Varuna** has a highly inclined orbit, which takes it as close as 28 degrees from the plane of the Solar System. ## Significance The discovery of **20000 Varuna** has significant implications for our understanding of the outer Solar System. The object's large size and highly eccentric orbit suggest that it may have formed in the early days of the Solar System, when the planets were still forming. The presence of water ice on its surface also provides insights into the composition of the outer Solar System. **20000 Varuna** is an important target for future astronomical studies, as it may provide valuable information about the formation and evolution of the Solar System. INFOBOX: - **Name:** 20000 Varuna - **Type:** Kuiper Belt Object (KBO) - **Date:** November 28, 2000 - **Location:** Kuiper Belt - **Known For:** Large size and highly eccentric orbit TAGS: Kuiper Belt Object, Trans-Neptunian Object, Water Ice, Tholins, Astrometry, Solar System Formation, Outer Solar System, Dwarf Planet.