Final answer:
Potentially Hazardous Asteroid (PHA) statuses turn red when there is a higher probability of the asteroid coming close to Earth. Overdue items may include monitoring potential impact trajectories and analyzing the asteroid's characteristics.
Step-by-step explanation:
The PHA (Potentially Hazardous Asteroid) statuses turn red when there is a higher probability of the asteroid coming close to Earth. This is usually when the asteroid's orbital path intersects with Earth's orbit. The red status indicates a higher level of concern and attention.
Items that may be overdue for PHA statuses turning red could include monitoring and tracking potential impact trajectories, analyzing the asteroid's size and composition, and assessing the potential damage it could cause if it were to collide with Earth.
It is crucial to closely monitor red PHA statuses to ensure timely response and appropriate mitigation measures if needed.