Called 2017 OF 201, this mysterious trans-Neptunian object ... About one-third the size of Pluto, with an estimated 435 miles (700 km), it may shortly rank among dwarf planets.

2017 OF201 is about one-third the size of Pluto, which was reclassified as a dwarf planet in August 2006, and "is likely large enough to qualify as a dwarf planet, and its orbit is extremely wide ...

“The last time 2017 OF201 passed close to us was in November of 1930,” the researchers wrote, “and it will come back again in about 25,000 years.” That date is rich with coincidence. Pluto ...

Pluto, the largest of those dwarf planets, has a diameter of about 1,477 miles (2,377km). The mass of 2017 OF201 is estimated to be about 20,000 times smaller than Earth's and 50 times smaller ...

Cheng and his colleagues estimate 2017 OF 201 ’s diameter to be 700 km, which would make it the second largest known object in such a wide orbit. The diameter of Pluto, meanwhile, is 2,377 km.

Astronomers have discovered a new small planet far from Pluto, expanding our understanding of the solar system's far reaches. Nicknamed 2017 OF201, this trans-Neptunian object (TNO) is one of the ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between five and 18, plus hundreds of potentially undiscovered ones, depending on whom ...

Pluto, the largest of those dwarf planets, has a diameter of about 2,377km. The mass of 2017 OF201 is estimated to be about 20,000 times smaller than Earth’s and 50 times smaller than Pluto’s ...

A possible dwarf planet, like Pluto, has been observed in our solar system, according to a preprint published in arXiv. The area of space where this planet was found was previously thought empty.

The team has named the celestial body 2017 OF201. ... as one of the most distant visible objects in the solar system and is said to be large enough to rival the size of Pluto.

Earth has a newly-discovered neighbor in the solar system.. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...