Discover a new dwarf planet at the edge of the solar system

A new dwarf planet about 700 km in diameter has been found orbiting a little further away from Pluto. This planet is added to the 5 dwarf planets around Pluto that we have known so far. The discovery was made by the Canada-France-Hawaii Telescope and was officially announced yesterday by the International Astronomical Union.

Until a suitable mythological name is chosen for this space object, it will be known as RR245. The space object was discovered in February by photographs taken during the OSSOS mission in September last year.

“I could see it on the monitor screen,” said Dr. Michele Bannister of the University of Victoria in a statement. “A point of light that moved so slowly that Neptune had to be at least twice as far from the sun.” After the first observation, the rest of the time to date has been spent confirming its existence and finding its circuit.

We do not know much about the RR245 due to the long distance. “It’s either small and bright or big and cloudy,” says Bannister. Astronomers are keen to know which of the two is true, given that the amount of luminosity gives us important information about the surface chemistry of a planet. OSSOS currently uses a diameter of about 700 km. As a result, the dwarf planet is probably smaller than the dwarf planet Ceres. “The dwarf planet Haumea is covered in ice (water) and reflects light easily. This could be due to a history of severe collisions,” says Bannister. The size of an object can also affect what icy shapes remain on the surface. Larger objects can also store molecules such as methane, while smaller objects lose methane molecules over billions of years due to volatile physics.


Bannister says astronomers are looking for time for the RR245 to pass in front of a star so they can measure its dimensions.

But there is more information about the circuit. It takes 700 years for a full rotation of the dwarf planet around the Sun, with RR245 spending much more time away from other known objects in the solar system, at a distance of 19 billion kilometers or 128 astronomical units (AU). Distance from the earth to the sun) from the sun. Of course, in 2092, the dwarf planet will reach the closest point of its orbit (34 astronomical units), which is not far from the orbit of Neptune and is closer to the Sun than the average distance of Pluto.

Given that the dwarf planet is about a third the diameter of Pluto, RR245 may lack interesting geological aspects similar to those discovered on the New Horizons mission. However, even before the New Horizons mission, Pluto was expected to be much less active than what was observed, so our RR245 may surprise us. If, like many of the known dwarf planets in the outer part of the solar system, this planet also has a moon, we may not only find its exact mass but also have a better chance of finding something very exciting.

OSSOS has discovered more than 500 objects far from Neptune, but RR245 is the largest and only dwarf planet ever discovered. These discoveries were made possible by a large imager mounted on the massive CFH telescope.

The orbits of other objects at a distance from the Sun have shown signs of alignment, which is used as evidence for the existence of a ninth planet in our solar system that has never been seen before. Bannister and Michael Brown, the most serious proponents of the ninth planet theory, told IFLScience that the RR245 orbit is too close to the sun and that the ninth planet will not affect it, leaving the dwarf planet with no evidence to prove or disprove it. The existence of the ninth planet. “The RR245 orbit, although far away, is completely dominated by Neptune’s gravitational pull,” Bannister wrote in a statement.