For the IAU, the acceptance criteria were for naming purposes. The object was discovered by American astronomers Chad Trujillo and Michael Brown at the Palomar Observatory on 4 June 2002. It is named after the Hindu deity Varuna, one of the oldest deities mentioned in the Vedic texts. https://en.wikipedia.org/w/index.php?title=List_of_possible_dwarf_planets&oldid=977771278, Creative Commons Attribution-ShareAlike License, This page was last edited on 10 September 2020, at 21:48. Although it makes up approximately a fourth of the mass of the asteroid belt, it is still 14 less massive than Pluto. And only in the Kuiper belt region, there may be over 200 in numbers of it. There are other differences between planets and dwarf planets, with the main one being that dwarf planets have not cleared other objects in the area that they orbit.
For three-quarters of a century, schoolkids learned that our solar system has nine planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
Ein Planet ist ein astronomisches Objekt, das sich auf einer Bahn um die Sonne befindet, über eine ausreichende Masse verfügt, um durch seine Eigengravitation eine annähernd runde Form (hydrostatisches Gleichgewicht) zu bilden, und; die Umgebung seiner Bahn bereinigt hat (siehe planetarische Diskriminante). has cleared the neighborhood around its orbit. The outer planets show evidence of interaction with plutoids. It measures approximately 1,121 km (697 mi) in diameter, about half the diameter of Pluto. The astronomers have discovered the ceres at around in 1801. In 2010, Gonzalo Tancredi presented a report to the IAU evaluating a list of 46 candidates for dwarf planet status based on light-curve-amplitude analysis and the assumption that the object was more than 450 kilometres (280 mi) in diameter.
But the differences between planets and dwarf planets may not be obvious at first. Icy satellites as large as 1500 km in diameter have proven to not be in equilibrium, whereas dark objects in the outer solar system often have low densities that imply they are not even solid bodies, much less gravitationally controlled dwarf planets. Estimates have run as high as 200 in the Kuiper belt [1] and over 10,000 in the region beyond. Thanks for finally writing about it; Dwarf Planets vs Planets: Dwarf Planets List in Order; Liked it! Gonggong is in a 3:10 orbital resonance with Neptune, in which it completes three orbits around the Sun for every ten orbits completed by Neptune. Eris has one known moon and was discovered in January 2005. Haumea was discovered in December 2004. The International Astronomical Union defines a planet as being in orbit around the sun, has enough gravity to pull its mass into a rounded shape (hydrostatic equilibrium), and has cleared its orbit of other, smaller objects. [3] The IAU has not addressed this issue since these findings. It is approximately 940 kilometers across its longest axis, as it has an elongated shape. Weywot is measured to be 170 km (110 mi) across. In between 2005 to 2006 it was considered as 10th planet of our solar system by most of the astronomers. It used to be a planet but in 2006 IAU decided to re-classify it into the dwarf planets category. The International Astronomical Union (IAU) defined in August 2006 that, in the Solar System, a planet is a celestial body which: Eris is the most massive and second-largest known dwarf planet in the Solar System.
50000 Quaoar is a non-resonant trans-Neptunian object (cubewano) and a possible dwarf planet in the Kuiper belt, a region of icy planetesimals beyond Neptune.
Its surface is thought to be composed of frozen methane, ethane, and nitrogen. Get breaking space news and the latest updates on rocket launches, skywatching events and more! NY 10036. The surface of Eris is likely nitrogen and methane-rich, but in a thin (1 millimeter) layer across the surface. Grundy et al. Read on to meet our (current) five. [5][6][7] Current observations are generally insufficient for a direct determination as to whether a body meets this definition. Mike Brown considers a large number of trans-Neptunian bodies, ranked by estimated size, to be "probably" dwarf planets. But things changed five years ago. It was discovered in December 2000 by American astronomer Robert McMillan during a Spacewatch survey at the Kitt Peak National Observatory. Bodies in this size range should have begun to collapse the interstitial spaces left over from their formation, but not fully, leaving some residual porosity. Other compounds like methane or ammonia may also be present on its surface. has "cleared the neighborhood" around its orbit. Eris was discovered in January 2005 by a Palomar Observatory-based team led by Mike Brown, and its discovery was verified later that year. 38628 Huya ( hoo-YAH), provisional designation 2000 EB173, is a binary trans-Neptunian object located in the Kuiper belt, a region of icy objects orbiting beyond Neptune in the outer Solar System. [11] Thus Ceres, at 950 km in diameter, is the smallest body for which gravitational measurements indicate current hydrostatic equilibrium. Caltech astronomer Mike Brown led the team that discovered Eris in 2005.
If Grundy et al. It was discovered in 2004 by a team headed by Mike Brown of Caltech at the Palomar Observatory in the United States and independently in 2005 by a team headed by José Luis Ortiz Moreno at the Sierra Nevada Observatory in Spain, though the latter claim has been contested. It has one known natural satellite. On Aug. 24, 2006, the International Astronomical Union (IAU) struck Pluto from the list, demoting it to the newly created category of "dwarf planet." In the below table both dwarf planets are listed like ‘near-certain’ as well as ‘IAU defined’. The three objects under consideration during the debates leading up to the 2006 IAU acceptance of the category of dwarf planet – Ceres, Pluto and Eris – are generally accepted as dwarf planets, including by those astronomers who continue to classify dwarf planets as planets. Sicilian astronomer Giuseppe Piazzi discovered Ceres in 1801 based on the prediction that the gap between Mars and Jupiter contained a missing planet. But Eris is even more far-flung, orbiting the sun at an average distance of about 6.3 billion miles (10.1 billion km). Seldom do I encounter a blog that’s both educative and amusing, and let me tell you, you have hit the nail on the head.
It is named after Juyá, the mythological rain god of the Wayuu people native to South America. A small amount of methane is present on its surface, which can only be retained by the largest Kuiper belt objects. Though there may be more than, The naming committee of the IAU has decided some of the. The majority of mid-sized TNOs up to about 900–1000 km in diameter have significantly lower densities (~ 1.0–1.2 g/ml) than larger bodies such as Pluto (1.86 g/ml).
Its official name comes from the Rapa Nui fertility god. Grundy et al.