This is the name of the planet and the basic dimensions.  You will notice it is quite small hence being a dwarf planet:

The planet is about 700 km in size, and has been given the name 2015 RR245. It was first sighted by Dr. JJ Kavelaars, of the National Research Council of Canada, in images taken in 2015. Dwarf planets are notoriously difficult to spot, but they’re important pieces of the puzzle in tracing the evolution of our Solar System.

Dr. Michele Bannister, of the University of Victoria in British Columbia, describes the moment when the planet was discovered: “There it was on the screen— this dot of light moving so slowly that it had to be at least twice as far as Neptune from the Sun.”

What would you have done if you discovered a planet?  Would you have freaked out or called a friend like on that old tv show where you could ask for help to solve the question?  Check for updates as they come in.

thanks to universetoday.com for the great info