Astronomers of the United States found new evidence of the existence of the hypothetical ninth planet in the solar system. They confirmed that clustering the orbits of the object belt objects is not the result of a systematic observation error and can indeed be caused by a non-open massive object or planet X. This is reported in an article published in the reprints of the ARXIV preprints.
The authors of the new work took into account the possibility of biased data, but even in this case, the orbits clustering is statistically unusual. The likelihood that it is a consequence of chance is only 0.4 percent. It also allowed researchers to more accurately determine the location of the likely orbit of the ninth planet. It turned out that she should be slightly closer to the sun, which was expected initially. And if the planet exists, it must be detected using the Obra Rubin Observatory, which will be put into operation in 2022.
In 2016, American astronomers Michael Brown and Konstantin Batygin studied the statistical distribution of the orbits of the object belt objects and concluded that clustering should be caused by an external planet that is not open. According to their calculations, this object has a lot of five lands and is about ten times removed from the Sun than Neptune.