This massively elongated orbit that suggests an object which is influenced by the theoretical giant Planet Nine in the Oort Cloud region
An extremely distant dwarf planet, named The Goblin, has been discovered in observations that are redefining the outer reaches of the solar system.
Astronomers made the discovery while hunting for a hypothetical massive planet, known as planet nine, that is suspected to be in orbit far beyond Pluto in a mysterious region known as the Oort cloud. Planet Nine has not yet been seen directly, but The Goblin appears to be under the gravitational influence of a giant unseen object, adding to astronomers’ certainty that it is out there.
The newly discovered icy world, estimated to be just 300km across, is in an extremely elongated orbit. At its closest, it gets about two and a half times as far from the sun as Pluto. Then it heads off to the outermost fringes of the solar system, to almost 60 times further out than Pluto, taking an astounding 40,000 years to loop once around the sun. For 99% of its orbit, it would be too faint to see.
The discovery was made using the Japanese Subaru 8-metre telescope located on the dormant Mauna Kea volcano in Hawaii.
The telescope is the only one in the world to be able to produce deep images capable of probing the outer reaches of the solar system, while also having a wide enough field of view to be able to image enough sky to discover rare objects.
With other large telescopes, it is like looking through a straw and thus they are good for observing things you know are there, but not for finding new things as their field of views are too small for covering large areas of sky,