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Astronomers have found — way beyond the orbit of Pluto — an intriguing distant object orbiting the sun.

It’s just a dwarf planet, about 200 miles across, but some researchers think finding it increases the likelihood that there is a heretofore undiscovered giant planet lurking in the outer reaches of our solar system. That would bring the number of true planets in our solar system back to nine, replacing Pluto which was demoted in 2006.

Scott Sheppard and his colleagues at the Carnegie Institution for Science first spotted the new object, known officially as 2015 TG 387, around Halloween three years ago, so they gave it the nickname “The Goblin.”

“It’s on the small end of a dwarf planet,” Sheppard says. “We don’t know exactly how big it is, but we think it’s about 300 kilometers in size, which is about six or seven times smaller than Pluto.”

A Small Planet With Big Implications

GIF: Courtesy of Scott Sheppard Caption: The discovery images of 2015 TG387 taken by an 8-meter telescope located atop Mauna Kea in Hawaii in October 2015. The images were taken about 3 hours apart. 2015 TG387 can be seen moving between images near the center while the much more distant stars and galaxies are stationary.