If the object were not captured during interstellar travel attraction of the Sun, he, like the vast majority of other TRANS-Neptunian objects, formed together with the Solar system and the orbit it should be in a common plane.
Now, a group of scientists think they have found a distant object that could be as big as a dwarf planet, but has a different orbit to most objects that are travelling around our sun. But I would say the presence of an object like this in our solar system bolsters the case for Planet Nine'.
There are a couple hypotheses for what may have thrown its orbit off-kilter, but when researchers ran simulations on potential causes, they found that if they simulated a planet with properties like those proposed by a CalTech team in 2016, the orbit suddenly made sense. Actually, this is the most extreme Trans-Neptunian Object ever found. The new discovery confirms a prediction made by astronomers Konstantin Batygin and Michael Brown who first theorized the existence of Planet Nine. It used computer simulations of the solar system to figure out how the object may have come across this unusual orbit.
A planet which has never been seen by astronomers could be lurking at the dark edges of our solar system, astronomers believe. Speaking to Quanta co-author of the paper David Gerdes said that this isn't proof that there is a planet nine but that the presence of 2015 BP519 makes it more likely that there is a planet nine. The claim led to scientists searching for this theorized planet that is thought to have about ten times the mass of Earth.
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That invisible surface is the solar system's "plane", and compared to it, 2015 BP519's orbit is heavily skewed.
Once researchers added properties proposed by researchers from Caltech theorizing about a ninth planet, 2015 BP519's orbit matched nearly exactly. Guess what? The object's orbit matched nearly exactly.
There's been a number of studies that have offered evidence for the existence of Planet Nine, but this new research provides one of the most persuasive arguments yet. There are also objects in the Kuiper Belt that orbit in the opposite direction as the rest of the objects in the solar system.