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Correct Answer

A Eris

Model Answer

This dwarf planet was discovered in January 2005 by a team of Palomar Observatory under the leadership of Mike Brown.
It is the second-largest known dwarf planet in our solar system and the most massive one.
The planet derived its name from the Greek goddess Eris (goddess of discord and strife) as it remains the topic of scientific debate about the definition of a planet.
Its size is almost the same as that of Pluto with a radius of about 1,163 km (approx. one-fifth the radius of Earth). Its mass is 127 percent that of Pluto.
It is about 96.3 astronomical units away from the Sun and sunlight takes more than 9 hours to reach the surface of Eris.
Eris makes one revolution around the Sun is approx. 558 Earth years and one rotation in every 25.9 hours.
Its surface temperature varies between around 30 and 56 K and the surface has the presence of methane ice.