Complex sentence: The asteroid's orbit is near that of a 3:8 resonance with Earth, meaning that for every 8 orbits the Earth makes, 2016 PQ makes roughly 3, contributing to the fact that it makes no significant close approaches in the next few decades.
Split into simpler sentences: The asteroid's orbit is near that of a 3:8 resonance with Earth, meaning that for every 8 orbits the Earth makes, 2016 PQ makes roughly 3. This may contribute to the fact that it makes no significant close approaches in the next few decades.