FWIW, this is still below the background hazard (the Palermo scale[0] is negative). This type of object (size + probability) generically exists all the time. [

FWIW, this is still below the background hazard (the Palermo scale[0] is negative). This type of object (size + probability) generically exists all the time. [0] https://en.wikipedia.org/wiki/Palermo_scale https://en.wikipedia.org/wiki/Palermo_scale ("A rating of 0 means the hazard is equivalent to the background hazard (defined as the average risk posed by objects of the same size or larger over the years until the date of the potential impact).")