What is a celestial object that the sun and has a spherical shape but does not dominate its orbit?

A celestial object that orbits the Sun, has a spherical shape, but does not dominate its orbit is a dwarf planet, such as Pluto. Unlike planets, dwarf planets share their orbital zones with other objects of similar size and do not clear their orbits of debris. Pluto is a prime example, as it resides in the Kuiper Belt alongside many other small icy bodies.