The dwarf planet in the belt, Kopara 2007 OR10, the largest of not having a final naming TRANS-Neptunian objects in the Solar system, discovered its own satellite, the diameter of which is estimated at 250-350 km. The discovery was made by employees located in Hungary Observatory of Cocoa.
The diameter of the 2007 OR10 is 1535 kilometers, the weight is comparable to that of Pluto, the largest and to be the first discovered dwarf planet. Recently the attention of specialists was attracted by the fact that 2007 OR10 rotates on its axis about two times slower than the other objects in the Kuiper belt — a full rotation was 45, not 20 to 24 hours. As explanation of this observation was made that the rotation is slowing due to gravitational interaction with the satellite, but the satellite at that time was not detected.
After analyzing images of space telescopes “Hubble” and “Spitzer” in ten years, experts came to the conclusion that they are interested in the satellite repeatedly came into picture in 2009 and 2010, but to see him on the satellite images was only now that astrophysicists have studied them “with passion”.
Although 2007 OR10 was discovered on 17 July 2007, and in early 2009, the discovery was officially announced, the facility still have not received the full title is his current designation is the year of opening in combination with a temporary designation. Moreover, among all the objects belonging to the Kuiper Belt, the size of this celestial body, second only to Pluto and Eris. To reopen this object is also considered one of the two dwarf planets do not have their own satellites. Now the only dwarf planet, which satellites are still not discovered, Sedna remains. According to experts, the fact that almost all of the dwarf planets of sufficiently large size satellites suggests that this trend allows you to better understand the principles on which to form such objects and evolyutsioniruet Solar system as a whole.