What is a plutoid?
A) any object in a 2:3 orbital resonance with Neptune
B) any object in the same orbit as Pluto
C) any object in an orbit outside that of Pluto
D) any object beyond the orbit of Neptune that has enough mass to assume a spherical shape

Question

Quizplus · Accepted Answer

A plutoid is any object beyond the orbit of Neptune that has enough mass to assume a spherical shape. This definition includes Pluto and other dwarf planets such as Eris and Haumea. The term was introduced in 2008 by the International Astronomical Union (IAU) to describe these types of objects.

What Is a Plutoid