Does this exoplanet have a sibling sharing the same orbit?

Astronomers have found the possible 'sibling' of a planet orbiting a distant star. The team has detected a cloud of debris that might be sharing this planet's orbit and which, they believe, could be the building blocks of a new planet or the remnants of one already formed. If confirmed, this discovery would be the strongest evidence yet that two exoplanets can share one orbit.

from Latest Science News -- ScienceDaily https://ift.tt/cfgaBoF