What are other names for planetoids that aren't orbiting a solar system, but hurtling through space? I'm trying to think of a good word for an asteroid/planetoid that has no stable orbit but has been ejected from a system and is passing close to a sun. Any help?
See nnnnnn's comment below.

The NASA website, describing 'oumuamuam, uses the term "interstellar object." Extrasolar asteroid would seem to be another option.  I haven't seen a unique word different from asteroid that originated outside of the solar system.

It seems a simple prefix is sufficient to describe objects beyond the solar system, i.e. exoplanet.

Scienfitic American has an article which uses the term "interstellar object."

Also, see answers to:


Is intrastellar commonly used by astronomers to refer to objects within our solar system?
Adjective for things outside our solar system