Английская Википедия:(528219) 2008 KV42

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Шаблон:Mp (provisional designation: Шаблон:Mp; nicknamed Drac) is a trans-Neptunian object and the first one with a retrograde orbit to be discovered. This retrograde motion with an orbital inclination of 103° suggests that it is the missing link between its source in the Hills cloud and Halley-type comets, thus providing further insight into the evolution of the outer Solar System. The object measures approximately Шаблон:Convert in diameter. With a semi-major axis of 42 AU, it takes about 269 years to complete an orbit around the Sun.

Officially discovered on 31 May 2008, the discovery was announced on 16 July 2008, by the Canada–France Ecliptic Plane Survey team led by Brett Gladman. The discovery team nicknamed Шаблон:Mp "Drac" after Count Dracula.

Discovery and naming

The discovery of Шаблон:Mp was announced on 16 July 2008 by the Canada–France Ecliptic Plane Survey team led by Brett Gladman from the University of British Columbia. The announcement was made during the "Asteroids, Comets, Meteors" meeting held in Baltimore, Maryland, followed by a Minor Planet Electronic Circular on the same day and an IAU Circular on 18 July. The discovery was made using images obtained on 31 May from the 3.5-meter Canada-France-Hawaii Telescope, followed by further observations until 8 July from the Whipple Observatory and Cerro Tololo.

The discovery team nicknamed Шаблон:Mp Drac because of its high inclination in reference to its orbital plane resembling Count Dracula's ability to walk on walls.

Orbit

Файл:2008 KV42 and 2011 KT19.png

Orbits of Шаблон:Mp and Шаблон:Mp

Шаблон:Mp is the first trans-Neptunian object (TNO) with a retrograde orbit to be discovered. With a semi-major axis of 41.7 AU, it was discovered while at a distance of 32 AU and has a perihelion at roughly the distance of Uranus.

The object's 103° inclination makes its almost perpendicular to the ecliptic, and is, as of July 2017, one of only six objects known to have inclination and perihelion larger than 60° and 15 AU, respectively. The other six are: Шаблон:Mpl, Шаблон:Mpl, Шаблон:Mpl, Шаблон:Mpl, and Шаблон:Mpl.

Its unusual orbit suggests that Шаблон:Mp may have been perturbed inwards from its source, most likely in the Hills cloud, by an unknown gravitational disturbance. Its discovery may reveal the source regions for Halley-type comets which also have an retrograde orbit, but their origin remains unknown. Шаблон:Mp itself is believed to be in an intermediate stage towards becoming a comet, thus helping to further explain the formation and evolution of the outer Solar System.

Planet Nine

Шаблон:Mp may even provide evidence of Planet Nine. The Kozai effect inside the mean-motion resonances with Planet Nine may cause a periodic exchange between its inclination and its eccentricity. When the elongated perpendicular centaurs get too close to a giant planet, orbits such as that of Шаблон:Mp are created.

See also

• List of trans-Neptunian objects
• (471325) 2011 KT₁₉ ("Niku")

External links

• Шаблон:AstDys
• Шаблон:JPL small body